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Number of items: 74.

Lotfi, Maryam ORCID: https://orcid.org/0000-0002-1261-9834 and Walker, Helen ORCID: https://orcid.org/0000-0002-0892-9231 2025. See no evil, hear no evil, speak no evil? Barriers to modern slavery risk management in supply chains: an empirical investigation. Production Planning and Control 36 (8) , pp. 1044-1059. 10.1080/09537287.2024.2335496
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Li, Ying, Xu, Zhiduan, Walker, Helen ORCID: https://orcid.org/0000-0002-0892-9231, Gosling, Jonathan ORCID: https://orcid.org/0000-0002-9027-9011 and Tse, Mike ORCID: https://orcid.org/0000-0001-6174-0326 2025. How to balance sustainability and risk in supply chain management: a manufacturing perspective. Presented at: IPSERA, Rotterdam, Netherlands, 30 March - 02 April 2025.
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Walker, Helen ORCID: https://orcid.org/0000-0002-0892-9231 and Flynn, Anthony ORCID: https://orcid.org/0000-0002-1755-7986 2025. Public Procurement Strategy. Dimanda, A., Brunjes, B. and Patrucco, A.S., eds. Teaching Public Procurement: Bridging Theory and Practice, Taylor & Francis Group,

Alexander, Anthony, Kumar, Maneesh ORCID: https://orcid.org/0000-0002-2469-1382, Walker, Helen ORCID: https://orcid.org/0000-0002-0892-9231 and Gosling, Jon ORCID: https://orcid.org/0000-0002-9027-9011 2024. Innovation for zero-deforestation sustainable supply chain management services: a performance measurement and management approach. Supply Chain Management 29 (3) , pp. 620-641. 10.1108/SCM-02-2023-0088
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Strand, Vanja, Lotfi, Maryam ORCID: https://orcid.org/0000-0002-1261-9834, Flynn, Anthony ORCID: https://orcid.org/0000-0002-1755-7986 and Walker, Helen ORCID: https://orcid.org/0000-0002-0892-9231 2024. A systematic literature review of modern slavery in supply chain management: State of the art, framework development and research opportunities. Journal of Cleaner Production 435 , 140301. 10.1016/j.jclepro.2023.140301
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Strand, Vanja, Lotfi, Maryam ORCID: https://orcid.org/0000-0002-1261-9834, Flynn, Anthony ORCID: https://orcid.org/0000-0002-1755-7986 and Walker, Helen ORCID: https://orcid.org/0000-0002-0892-9231 2024. Tackling modern slavery in supply chains through B2N collaborations. Presented at: POMS 2023: Production and Operations Management Society International Conference, Paris, France, 18-20 July 2023.
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Alexander, Anthony, Walker, Helen ORCID: https://orcid.org/0000-0002-0892-9231 and Delabre, Izabela 2022. A decision theory perspective on wicked problems, SDGs and stakeholders: the case of deforestation. Journal of Business Ethics 180 , pp. 975-995. 10.1007/s10551-022-05198-8
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Marques, Leonardo, Touboulic, Anne and Walker, Helen ORCID: https://orcid.org/0000-0002-0892-9231 2022. Sustainable supply chain management and theory: taking stock and looking ahead. Childe, Stephen and Soares, Anabela, eds. Handbook of Research Methods for Supply Chain Management, Handbooks of Research Methods in Management series, Edward Elgar Publishing Ltd, pp. 339-351. (10.4337/9781788975865.00027)

Strand, Vanja, Lotfi, Maryam ORCID: https://orcid.org/0000-0002-1261-9834, Flynn, Anthnoy ORCID: https://orcid.org/0000-0002-1755-7986 and Walker, Helen ORCID: https://orcid.org/0000-0002-0892-9231 2022. A systematic literature review of modern slavery risk management in the global supply chains: State of the art and research opportunities. Presented at: IPSERA 2022 Conference, Jönköping, Sweden, 10 -13 April 2022.

Moretto, Antonella, Patrucco, Andrea Stefano, Walker, Helen ORCID: https://orcid.org/0000-0002-0892-9231 and Ronchi, Stefano 2022. Procurement organisation in project-based setting: a multiple case study of engineer-to-order companies. Production Planning and Control 33 (9-10) , pp. 847-862. 10.1080/09537287.2020.1837938
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Lotfi, Maryam ORCID: https://orcid.org/0000-0002-1261-9834, Walker, Helen ORCID: https://orcid.org/0000-0002-0892-9231 and Rendon-Sanchez, Juan 2021. Supply chains’ failure in workers’ rights with regards to the SDG compass: a doughnut theory perspective. Sustainability 13 , 12526. 10.3390/su132212526
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Kelly, Stephen, Marshall, Donna, Walker, Helen ORCID: https://orcid.org/0000-0002-0892-9231 and Israilidis, John 2021. Supplier satisfaction with public sector competitive tendering processes. Journal of Public Procurement 21 (2) , pp. 183-205. 10.1108/JOPP-12-2020-0088

Jones, Alexander, Wang, Yingli ORCID: https://orcid.org/0000-0001-5630-9558, Peattie, Kenneth ORCID: https://orcid.org/0000-0003-3969-0531 and Walker, Helen ORCID: https://orcid.org/0000-0002-0892-9231 2021. Conceptualising supply chain resilience within social enterprises. Presented at: 25th International Symposium on Logistics (ISL 2021), Virtual, 12-13 July 2021.
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Flynn, Anthony ORCID: https://orcid.org/0000-0002-1755-7986 and Walker, Helen ORCID: https://orcid.org/0000-0002-0892-9231 2020. Corporate responses to modern slavery risks: An institutional theory perspective. European Business Review 33 (2) , pp. 295-315. 10.1108/EBR-05-2019-0092
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Wontner, Karen Lorraine, Walker, Helen ORCID: https://orcid.org/0000-0002-0892-9231, Harris, Irina ORCID: https://orcid.org/0000-0003-0622-5123 and Lynch, Jane ORCID: https://orcid.org/0000-0003-2863-8594 2020. Maximising “community benefits” in public procurement: tensions and trade-offs. International Journal of Operations and Production Management 40 (12) , pp. 1909-1939. 10.1108/IJOPM-05-2019-0395
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Patrucco, Andrea Stefano, Walker, Helen ORCID: https://orcid.org/0000-0002-0892-9231, Luzzini, Davide and Ronchi, Stefano 2019. Which shape fits best? Designing the organizational form of local government procurement. Journal of Purchasing and Supply Management 25 (3) , 100504. 10.1016/j.pursup.2018.06.003
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Alexander, Anthony, Kumar, Maneesh ORCID: https://orcid.org/0000-0002-2469-1382 and Walker, Helen ORCID: https://orcid.org/0000-0002-0892-9231 2018. A decision theory perspective on complexity in performance measurement and management. International Journal of Operations and Production Management 38 (11) , pp. 2214-2244. 10.1108/IJOPM-10-2016-0632
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Lu, Haiyan, Potter, Andrew Thomas ORCID: https://orcid.org/0000-0002-3157-9735, Sanchez Rodrigues, Vasco ORCID: https://orcid.org/0000-0003-3375-3079 and Walker, Helen Lisbeth ORCID: https://orcid.org/0000-0002-0892-9231 2018. Exploring sustainable supply chain management: A social network perspective. Supply Chain Management 23 (4) , pp. 257-277. 10.1108/SCM-11-2016-0408
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Pettit, Stephen ORCID: https://orcid.org/0000-0001-7265-4079, Abouarghoub, Wessam ORCID: https://orcid.org/0000-0002-1647-1291, Harris, Irina ORCID: https://orcid.org/0000-0003-0622-5123, Walker, Helen ORCID: https://orcid.org/0000-0002-0892-9231 and Veskova, Bilyana 2018. Theoretical developments in humanitarian aid supply chain management. Presented at: 9th European Decision Science Institute Conference, Udine, Italy, 3-6 June 2018.

Meehan, Joanne, Touboulic, Anne ORCID: https://orcid.org/0000-0001-8629-7199 and Walker, Helen ORCID: https://orcid.org/0000-0002-0892-9231 2016. Time to get real: The case for critical action research in purchasing and supply management. Journal of Purchasing and Supply Management 22 (4) , pp. 255-257. 10.1016/j.pursup.2016.08.006
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Alexander, Anthony Edward and Walker, Helen ORCID: https://orcid.org/0000-0002-0892-9231 2016. Symbolic or substantive claims: an analysis of planetary boundary impacts from tracing supply chains of UK based companies. Presented at: Euroma Sustainable Operations and Supply Chain Forum, Lancaster UK, 11-12 April 2016. Euroma Sustainable Operations and Supply Chain Forum.

Alexander, Anthony Edward and Walker, Helen L. ORCID: https://orcid.org/0000-0002-0892-9231 2016. Decision making in sustainable supply chain management: cross-sector case studies of implementation. Presented at: IPSERA 2016, Dortmund, Germany, 20-24 March 2016. IPSERA 2016 Proceedings. Dortmund, Germany:

Touboulic, Anne ORCID: https://orcid.org/0000-0001-8629-7199 and Walker, Helen ORCID: https://orcid.org/0000-0002-0892-9231 2016. A relational, transformative and engaged approach to sustainable supply chain management: the potential of action research. Human Relations 69 (2) , pp. 301-343. 10.1177/0018726715583364
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Touboulic, Anne ORCID: https://orcid.org/0000-0001-8629-7199 and Walker, Helen Lisbeth ORCID: https://orcid.org/0000-0002-0892-9231 2015. Love me, love me not: A nuanced view on collaboration in sustainable supply chains. Journal of Purchasing & Supply Management 21 (3) , pp. 178-191. 10.1016/j.pursup.2015.05.001
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Walker, Helen ORCID: https://orcid.org/0000-0002-0892-9231, Chicksand, Daniel, Radnor, Zoe and Watson, Glyn 2015. Theoretical perspectives in operations management: an analysis of the literature. International Journal of Operations and Production Management 35 (8) , pp. 1182-1206. 10.1108/IJOPM-02-2014-0089
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Lu, Haiyan, Potter, Andrew Thomas ORCID: https://orcid.org/0000-0002-3157-9735, Sanchez Rodrigues, Vasco ORCID: https://orcid.org/0000-0003-3375-3079 and Walker, Helen Lisbeth ORCID: https://orcid.org/0000-0002-0892-9231 2015. Informal relationships and their impacts on supply chain management. Presented at: 20th International Symposium on Logistics, Bologna, Italy, 5-8 July 2015. Proceedings of the 20th International Symposium on Logistics, Bologna, 5th - 8th July. pp. 195-202.
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Wontner, Karen, Walker, Helen Lisbeth ORCID: https://orcid.org/0000-0002-0892-9231, Harris, Irina ORCID: https://orcid.org/0000-0003-0622-5123 and Lynch, Jane ORCID: https://orcid.org/0000-0003-2863-8594 2015. Barriers and enablers to "living wage" in public sector contracts. Presented at: 24th Annual IPSERA Conference, Amsterdam, The Netherlands, 30 March - 2 April 2015.
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Walker, Helen Lisbeth ORCID: https://orcid.org/0000-0002-0892-9231 2015. New development: Public procurement research at IPSERA: aligning research and practice, and future trends. Public Money and Management 35 (2) , pp. 141-144. 10.1080/09540962.2015.1007710
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Touboulic, Anne ORCID: https://orcid.org/0000-0001-8629-7199 and Walker, Helen Lisbeth ORCID: https://orcid.org/0000-0002-0892-9231 2015. Theories in sustainable supply chain management: a structured literature review. International Journal of Physical Distribution & Logistics Management 45 (1/2) , pp. 16-42.
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Alexander, Anthony, Walker, Helen Lisbeth ORCID: https://orcid.org/0000-0002-0892-9231 and Naim, Mohamed Mohamed ORCID: https://orcid.org/0000-0003-3361-9400 2014. Decision theory in sustainable supply chain management: a literature review. Supply Chain Management 19 (5/6) , pp. 504-522. 10.1108/SCM-01-2014-0007
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Touboulic, Anne ORCID: https://orcid.org/0000-0001-8629-7199, Chicksand, Daniel and Walker, Helen ORCID: https://orcid.org/0000-0002-0892-9231 2014. Managing imbalanced supply chain relationships for sustainability: A power perspective. Decision Sciences 45 (4) , pp. 577-619. 10.1111/deci.12087
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Nordigarden, Daniel, Rehme, Jakob, Brege, Staffan, Chicksand, Daniel and Walker, Helen ORCID: https://orcid.org/0000-0002-0892-9231 2014. Outsourcing decisions - the case of parallel production. International Journal of Operations and Production Management 34 (8) , pp. 974-1002. 10.1108/IJOPM-06-2012-0230
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Walker, Helen ORCID: https://orcid.org/0000-0002-0892-9231, Seuring, Stefan, Sarkis, Joseph and Klassesn, Robert 2014. Sustainable operations management: recent trends and future directions [Editorial]. International Journal of Operations and Production Management 34 (5) 10.1108/IJOPM-12-2013-0557
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Alexander, Anthony, Touboulic, Anne ORCID: https://orcid.org/0000-0001-8629-7199 and Walker, Helen Lisbeth ORCID: https://orcid.org/0000-0002-0892-9231 2014. Making sense of SSCM: How companies express sustainable supply chain management issues in their public reports. Presented at: 1st Euroma Sustainability Forum, Groningen, The Netherlands, 24-25 March 2014.
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Walker, Helen Lisbeth ORCID: https://orcid.org/0000-0002-0892-9231, Alexander, Anthony and Touboulic, Anne ORCID: https://orcid.org/0000-0001-8629-7199 2013. An overview of sustainable public procurement research. Balancing Social, Environmental and Economic Considerations in Procurement, Supplement to the Annual Statistical Report on United Nations Procurement, vol. 2012. United Nations, pp. 8-14.

Alexander, Anthony and Walker, Helen Lisbeth ORCID: https://orcid.org/0000-0002-0892-9231 2013. Sustainable supply chain management: achieving optimal performance and outcomes. Presented at: 20th EurOMA Conference 2013, Dublin, Ireland, 7-12 June 2013.
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Alexander, Anthony and Walker, Helen Lisbeth ORCID: https://orcid.org/0000-0002-0892-9231 2013. Sustainable supply chain management and decision making: A literature review of decision analysis, stakeholders and systems theory. Presented at: IPSERA2013, Nantes, France, 24-27 March 2013.

Walker, Helen Lisbeth ORCID: https://orcid.org/0000-0002-0892-9231, Schotanus, Fredo, Bakker, Elmer and Harland, Christine 2013. Collaborative procurement: a relational view of buyer-buyer relationships. Public Administration Review 73 (4) , pp. 588-598. 10.1111/puar.12048

Schneller, Eugene, Harland, Christine, Walker, Helen Lisbeth ORCID: https://orcid.org/0000-0002-0892-9231 and Forrest, Samantha 2013. Systems of exchange: cooperative purchasing in the UK and US health sectors. Harland, Christine, Nassimbeni, Giudo and Schneller, Eugene, eds. The SAGE Handbook of Strategic Supply Management, SAGE Publications, pp. 214-238.

Walker, Helen Lisbeth ORCID: https://orcid.org/0000-0002-0892-9231 and Brammer, S. 2012. The relationship between sustainable procurement and e-procurement in the public sector. International Journal of Production Economics 140 (1) , pp. 256-268. 10.1016/j.ijpe.2012.01.008

Chicksand, Daniel, Watson, Glyn, Walker, Helen Lisbeth ORCID: https://orcid.org/0000-0002-0892-9231, Radnor, Zoe Jane and Johnston, Robert 2012. Theoretical perspectives in purchasing and supply chain management: an analysis of the literature. Supply Chain Management: an International Journal 17 (4) , 454 -472. 10.1108/13598541211246611

Walker, Helen Lisbeth ORCID: https://orcid.org/0000-0002-0892-9231 and Jones, Neil 2012. Sustainable supply chain management across the UK private sector. Supply Chain Management 17 (1) , pp. 15-28. 10.1108/13598541211212177

Touboulic, Anne ORCID: https://orcid.org/0000-0001-8629-7199 and Walker, Helen Lisbeth ORCID: https://orcid.org/0000-0002-0892-9231 2012. Action research in sustainable SCM. Presented at: Academy of Management Conference, Boston, MA, USA, 3-7 August 2012.

Nordigården, D., Rehme, J., Walker, Helen Lisbeth ORCID: https://orcid.org/0000-0002-0892-9231 and Bregge, S. 2012. Outsourcing strategies – combining outsourcing with in-house production. Presented at: IPSERA Conference, Naples, Italy, 1-4 April 2012.

Touboulic, Anne ORCID: https://orcid.org/0000-0001-8629-7199, Chicksand, D. and Walker, Helen Lisbeth ORCID: https://orcid.org/0000-0002-0892-9231 2012. Power in sustainable supply chain management. Presented at: IPSERA Conference, Naples, Italy, 1-4 April 2012.

Brandon-Jones, Emma, Brandon-Jones, Alistair and Walker, Helen Lisbeth ORCID: https://orcid.org/0000-0002-0892-9231 2011. Sustainable services: A conceptual framework. Presented at: 18th International Annual EurOMA Conference: Exploring Interfaces, Cambridge, UK, 3-6 July 2011.

Walker, Helen Lisbeth ORCID: https://orcid.org/0000-0002-0892-9231, Brandon-Jones, Emma and Brandon-Jones, Alistair 2011. Exploring service sustainability. Presented at: 22nd Annual POMS Conference, Reno, Nevada, USA, 29 April - 2 May 2011.

Touboulic, Anne ORCID: https://orcid.org/0000-0001-8629-7199, Walker, Helen Lisbeth ORCID: https://orcid.org/0000-0002-0892-9231, Barlow, James and Pettigrew, Mark 2011. Theoretical perspectives on sustainable supply chain management: A review of the literature. Presented at: 20th Annual IPSERA Conference 2011, Maastricht, the Netherlands, 10-13 April 2011.

Preuss, Lutz and Walker, Helen Lisbeth ORCID: https://orcid.org/0000-0002-0892-9231 2011. Psychological barriers in the road to sustainability: evidence from public sector procurement. Public Administration 89 (2) , pp. 493-521. 10.1111/j.1467-9299.2010.01893.x

Brammer, Stephen and Walker, Helen Lisbeth ORCID: https://orcid.org/0000-0002-0892-9231 2011. Sustainable procurement in the public sector: an international comparative study. International Journal of Operations & Production Management 31 (4) , pp. 452-476. 10.1108/01443571111119551

Schotanus, Fredo, Bakker, Elmer, Walker, Helen Lisbeth ORCID: https://orcid.org/0000-0002-0892-9231 and Essig, Michael 2011. Development of purchasing groups during their life cycle: from infancy to maturity. Public Administration Review 71 (2) , pp. 265-275. 10.1111/j.1540-6210.2011.02337.x

Walker, Helen Lisbeth ORCID: https://orcid.org/0000-0002-0892-9231, Brandon-Jones, Alistair and Brandon-Jones, Emma 2011. Exploring service sustainability. Presented at: EUROMA Conference, Cambridge, UK, 3-6 July 2011.

Walley, P. and Walker, Helen Lisbeth ORCID: https://orcid.org/0000-0002-0892-9231 2010. Sustainability as a sixth performance. Presented at: 17th International Annual EurOMA Conference, Porto, Portugal, 6-9 June 2010.

Walker, Helen Lisbeth ORCID: https://orcid.org/0000-0002-0892-9231, Chicksand, D., Radnor, Zoe Jane and Johnston, R. 2010. Theoretical perspectives in operations management: an analysis of the literature. Presented at: 17th International Annual EurOMA Conference, Porto, Portugal, 6-9 June 2010.

Walker, Helen Lisbeth ORCID: https://orcid.org/0000-0002-0892-9231 and Walley, P. 2010. Sustainability as a sixth performance. Presented at: 17th International Annual EurOMA Conference, Porto, Portugal, 6-9 June 2010.

Chicksand, Daniel, Watson, Glyn, Walker, Helen Lisbeth ORCID: https://orcid.org/0000-0002-0892-9231, Radnor, Zoe Jane, Johnston, Bob and Liyange, Kapila 2010. Theoretical perspectives in purchasing and supply: An analysis of the literature. Presented at: 19th Annual IPSERA Conference: Supply Management - Missing Link in Strategic Management?, Lappeenranta, Finland, 6-19 May 2010.

Chicksand, Daniel, Walker, Helen Lisbeth ORCID: https://orcid.org/0000-0002-0892-9231, Radnor, Zoe Jane and Johnston, Robin 2010. Theoretical perspectives in supply chain management. Presented at: 19th Annual IPSERA Conference, Lappeenranta, Finland, 16–19 May, 2010.

Walker, Helen Lisbeth ORCID: https://orcid.org/0000-0002-0892-9231 2009. Sustainable procurement: An analysis of constructs in the literature. Presented at: 16th International Annual EurOMA Conference, Gothenburg, Sweden, 14-17 June 2009.

Walker, Helen Lisbeth ORCID: https://orcid.org/0000-0002-0892-9231 and Bakker, Elmer 2009. Collaborative procurement: A relational view across the UK public sector. Presented at: 18th IPSERA Conference: Supply Management – Towards an Academic Discipline?, Wiesbaden, Germany, 5–8 April 2009. Proceedings of the 18th IPSERA Conference: Supply Management – Towards an Academic Discipline?, Wiesbaden, Germany, 5–8 April 2009. International Purchasing and Supply Education and Research Association (IPSERA), pp. 757-772.

Walker, Helen Lisbeth ORCID: https://orcid.org/0000-0002-0892-9231 and Bakker, E. 2009. Collaborative procurement across the UK public sector. Presented at: 18th Annual IPSERA Conference, Wiesbaden, Germany, 5- 8 April 2009.

Hampson, Joe, MacKenzie, Neil and Walker, Helen Lisbeth ORCID: https://orcid.org/0000-0002-0892-9231 2009. Case studies in sustainable and responsible procurement. Presented at: 18th IPSERA Conference Supply Management – Towards an Academic Discipline?, Wiesbaden, Germany, 5 – 8 April 2009. Proceedings of the 18th IPSERA Conference: Supply Management – Towards an Academic Discipline?, Wiesbaden, Germany, 5–8 April 2009. International Purchasing and Supply Education and Research Association (IPSERA), pp. 1112-1123.

Walker, Helen Lisbeth ORCID: https://orcid.org/0000-0002-0892-9231 2009. Sustainable procurement: a literature review. Presented at: 18th IPSERA Conference: Supply Management – Towards an Academic Discipline?, Wiesbaden, Germany, 5–8 April 2009. Proceedings of the 18th IPSERA Conference: Supply Management – Towards an Academic Discipline?, Wiesbaden, Germany, 5–8 April 2009. International Purchasing and Supply Education and Research Association (IPSERA), pp. 742-756.

Walker, Helen Lisbeth ORCID: https://orcid.org/0000-0002-0892-9231 and Phillips, Wendy 2009. Sustainable procurement: emerging issues. International Journal of Procurement Management 2 (1) , pp. 41-61. 10.1504/IJPM.2009.021729

Walker, Helen Lisbeth ORCID: https://orcid.org/0000-0002-0892-9231 and Brammer, S. 2008. Sustainable procurement and management commitment. Presented at: 14th Annual International Sustainable Development Research Conference, New Delhi, India, 21-23 September 2008.

Walker, Helen Lisabeth ORCID: https://orcid.org/0000-0002-0892-9231, Knight, L and Gough, S. 2008. Sustainable procurement and learning. Presented at: 3rd International Public Procurement Conference, Amsterdam, Netherlands, 28-30 August 2008.

Walker, Helen Lisbeth ORCID: https://orcid.org/0000-0002-0892-9231 and Brammer, S. 2008. Sustainable e-procurement: An international study. Presented at: 17th Annual IPSERA Conference, Perth, Australia, 9-12 March 2008.

Walker, Helen Lisbeth ORCID: https://orcid.org/0000-0002-0892-9231, Harland, C. and Warrington, J. 2008. Commissioning and procurement. Presented at: Third International Public Procurement Conference, Amsterdam, Netherlands, 28-30 August 2008.

Walker, Helen Lisbeth ORCID: https://orcid.org/0000-0002-0892-9231, Harland, Christine, Knight, Louise, Uden, Chris and Forrest, Samantha 2008. Reflections on longitudinal action research with the English National Health Service. Journal of Purchasing and Supply Management 14 (2) , pp. 136-145. 10.1016/j.pursup.2008.02.003

Walker, Helen Lisbeth ORCID: https://orcid.org/0000-0002-0892-9231, Gough, Stephen, Bakker, Elmer F., Knight, Louise A. and McBain, Darian 2008. Greening operations management: an online sustainable procurement course for practitioners. Journal of Management Education 33 (3) , pp. 348-371. 10.1177/1052562908323190

Walker, Helen Lisbeth ORCID: https://orcid.org/0000-0002-0892-9231 and Preuss, Lutz 2008. Fostering sustainability through sourcing from small businesses: public sector perspectives. Journal of Cleaner Production 16 (15) , pp. 1600-1609. 10.1016/j.jclepro.2008.04.014

Walker, Helen Lisbeth ORCID: https://orcid.org/0000-0002-0892-9231 and Harland, Christine 2008. E-procurement in the United Nations: influences, issues and impact. International Journal of Operations & Production Management 28 (9) , pp. 831-857. 10.1108/01443570810895276

Walker, Helen Lisbeth ORCID: https://orcid.org/0000-0002-0892-9231, Di Sisto, Lucio and McBain, Darian 2008. Drivers and barriers to environmental supply chain management practices: lessons from the public and private sectors. Journal of Purchasing and Supply Management 14 (1) , pp. 69-85. 10.1016/j.pursup.2008.01.007

Walker, Helen Lisbeth ORCID: https://orcid.org/0000-0002-0892-9231, Bakker, Elmer, Schotanus, Fredo and Harland, Christine 2008. Choosing an organisational form: the case of collaborative procurement initiatives. International Journal of Procurement Management 1 (3) , pp. 297-317. 10.1504/IJPM.2008.017527

Chicksand, Daniel, Kumar, Naveen, Rehme, Jakob and Walker, Helen Lisbeth ORCID: https://orcid.org/0000-0002-0892-9231 2001. Global sourcing: implications for purchasing and logistics – a research synthesis. Presented at: Global Sourcing Workshop, Courchevel, France, 14-17 March 2011.

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