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Number of items: 70.

Brown, Malcolm ORCID: https://orcid.org/0000-0002-2871-6591, Dohnal, Tomáš, Plum, Michael and Wood, Ian 2024. Spectrum of the Maxwell equations for a flat interface between homogeneous dispersive media. Communications in Mathematical Physics 406 (1) , 3. 10.1007/s00220-024-05154-9
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Brown, B. Malcolm ORCID: https://orcid.org/0000-0002-2871-6591, Schmidt, Karl Michael ORCID: https://orcid.org/0000-0002-0227-3024, Shipman, Stephen P. and Wood, Ian 2021. The inverse problem for a spectral asymmetry function of the Schrödinger operator on a finite interval. Mathematika 67 (4) , pp. 788-806. 10.1112/mtk.12105
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Brown, B. M. ORCID: https://orcid.org/0000-0002-2871-6591, Evans, W. D. and Wood, I. G. 2021. Non-negative extensions of Hamiltonian systems. Fritz Gesztesy and Andrei Martinez-Finkelshtein, eds. From Operator Theory to Orthogonal Polynomials, Combinatorics, and Number Theory, Operator Theory: Advances and Applications, Springer, pp. 15-39. (10.1007/978-3-030-75425-9_2)

Brown, B. M. ORCID: https://orcid.org/0000-0002-2871-6591, Hoang, V., Plum, M., Radosz, M. and Wood, I. 2020. Gap localization of multiple TE‐Modes by arbitrarily weak defects. Journal of the London Mathematical Society 102 (2) , pp. 773-795. 10.1112/jlms.12337

Brown, B. Malcolm ORCID: https://orcid.org/0000-0002-2871-6591, Marletta, Marco ORCID: https://orcid.org/0000-0003-1546-4046, Naboko, Serguei and Wood, Ian 2020. The functional model for maximal dissipative operators (translation form): an approach in the spirit of operator knots. Transactions of the American Mathematical Society 373 , pp. 4145-4187. 10.1090/tran/8029
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Bennewitz, Christer, Brown, Malcolm ORCID: https://orcid.org/0000-0002-2871-6591 and Weikard, Rudi 2020. Spectral and scattering theory for ordinary differential equations: Vol. I: Sturm–Liouville equations. Springer International Publishing.

Brown, B Malcolm ORCID: https://orcid.org/0000-0002-2871-6591, Klaus, Martin, Malamud, Mark, Mogilevskii, Vadim and Wood, Ian 2019. Weyl solutions and j-selfadjointness for Dirac operators. Journal of Mathematical Analysis and Applications 480 (2) , 123344. 10.1016/j.jmaa.2019.07.034

Brown, Brian M. ORCID: https://orcid.org/0000-0002-2871-6591, Marletta, Marco ORCID: https://orcid.org/0000-0003-1546-4046, Naboko, Sergey and Wood, Ian 2019. The detectable subspace for the Friedrichs model. Integral Equations and Operator Theory 91 , 49. 10.1007/s00020-019-2548-9
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Brown, Brian ORCID: https://orcid.org/0000-0002-2871-6591, Evans, W D. and Wood, I G. 2019. Positive self-adjoint operator extensions with applications to differential operators. Integral Equations and Operator Theory 91 , 41. 10.1007/s00020-019-2540-4
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Walker, David W. ORCID: https://orcid.org/0000-0002-1360-6330, Kramer, Stephan C., Biebl, Fabian R. A., Ledger, Paul D. and Brown, Malcolm ORCID: https://orcid.org/0000-0002-2871-6591 2019. Accelerating magnetic induction tomography-based imaging through heterogeneous parallel computing. Concurrency and Computation: Practice and Experience 31 (17) , e5265. 10.1002/cpe.5265

Alberti, Giovanni S., Brown, Malcolm ORCID: https://orcid.org/0000-0002-2871-6591, Marletta, Marco ORCID: https://orcid.org/0000-0003-1546-4046 and Wood, Ian 2019. Essential spectrum for Maxwell's equations. Annales Henri Poincaré 20 , pp. 1471-1499. 10.1007/s00023-019-00762-x
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Brown, Brian Malcolm ORCID: https://orcid.org/0000-0002-2871-6591, Langer, Heinz and Tretter, Christiane 2019. Compressed resolvents and reduction of spectral problems on star graphs. Complex Analysis and Operator Theory 13 (1) , pp. 291-320. 10.1007/s11785-018-0793-6
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Brown, B. M. ORCID: https://orcid.org/0000-0002-2871-6591, Hoang, V., Plum, M., Radosz, M. and Wood, I. 2017. Gap localization of TE-Modes by arbitrarily weak defects. Journal of the London Mathematical Society 95 (3) , pp. 942-962. 10.1112/jlms.12046
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Brown, Brian Malcolm ORCID: https://orcid.org/0000-0002-2871-6591, Marletta, Marco ORCID: https://orcid.org/0000-0003-1546-4046, Wood, I. and Naboko, S. 2017. Inverse problems for boundary triples with applications. Studia Mathematica 237 (3) , pp. 241-275. 10.4064/sm8613-11-2016
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Brown, Malcolm ORCID: https://orcid.org/0000-0002-2871-6591, Marletta, Marco ORCID: https://orcid.org/0000-0003-1546-4046 and Symons, Freddy 2016. Uniqueness from discrete data in an inverse spectral problem for a pencil of ordinary differential operators. Journal of the London Mathematical Society 94 (3) , pp. 793-813. 10.1112/jlms/jdw059
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Brown, Brian Malcolm ORCID: https://orcid.org/0000-0002-2871-6591, Marletta, Marco ORCID: https://orcid.org/0000-0003-1546-4046, Naboko, S. N. and Wood, I. G. 2016. Detectable subspaces and inverse problems for Hain-Lüst-type operators. Mathematische Nachrichten 289 (17-18) , pp. 2108-2132. 10.1002/mana.201500231
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Bennewitz, C., Brown, B. M. ORCID: https://orcid.org/0000-0002-2871-6591 and Weikard, R. 2016. The spectral problem for the dispersionless Camassa-Holm equation. Presented at: International Workshop on Operator Theory and Applications, Amsterdam, The Netherlands, 14-18 July 2014. Published in: Eisner, Tanja, Jacob, Birgit, Ran, Andre and Zwart, Hans eds. Operator Theory, Function Spaces, and Applications: International Workshop on Operator Theory and Applications, Amsterdam, July 2014. Operator Theory: Advances and Applications. Operator Theory: Advances and Applications Springer, pp. 67-90. 10.1007/978-3-319-31383-2_4

Brown, Brian Malcolm ORCID: https://orcid.org/0000-0002-2871-6591 and Evans, William Desmond 2016. Selfadjoint and m sectorial extensions of Sturm-Liouville operators. Integral Equations and Operator Theory 85 (2) , pp. 151-166. 10.1007/s00020-016-2296-z
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Brown, B. M. ORCID: https://orcid.org/0000-0002-2871-6591, Marletta, M. ORCID: https://orcid.org/0000-0003-1546-4046 and Reyes Gonzales, J. M. 2016. Uniqueness for an inverse problem in electromagnetism with partial data. Journal of Differential Equations 260 (8) , pp. 6525-6547. 10.1016/j.jde.2016.01.002
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Brown, B. M. ORCID: https://orcid.org/0000-0002-2871-6591, Hoang, V., Plum, M. and Wood, I. 2015. On the spectrum of waveguides in planar photonic bandgap structures. Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 471 (2176) , 20140673. 10.1098/rspa.2014.0673
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Brown, B. M. ORCID: https://orcid.org/0000-0002-2871-6591, Hoang, V., Plum, M. and Wood, I. 2014. Spectrum created by line defects in periodic structures. Mathematical News / Mathematische Nachrichten 287 (17-18) , pp. 1972-1985. 10.1002/mana.201300165

Boegli, Sabine, Brown, B. Malcolm ORCID: https://orcid.org/0000-0002-2871-6591, Marletta, Marco ORCID: https://orcid.org/0000-0003-1546-4046, Tretter, Christiane, Tretter, Christine and Wagenhoffer, Markus 2014. Guaranteed resonance enclosures and exclosures for atoms and molecules. Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 470 (2171) , 20140488. 10.1098/rspa.2014.0488
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Brown, Brian Malcolm ORCID: https://orcid.org/0000-0002-2871-6591, Langer, Heinz and Langer, Matthias 2013. Bessel-type operators with an inner singularity. Integral Equations and Operator Theory 75 (2) , pp. 257-300. 10.1007/s00020-012-2023-3

Brown, Brian Malcolm ORCID: https://orcid.org/0000-0002-2871-6591, Eastham, Michael S. P. and Schmidt, Karl Michael ORCID: https://orcid.org/0000-0002-0227-3024 2013. Periodic differential operators. Operator Theory: Advances and Applications, vol. 230. Basel: Birkhäuser.

Brown, Brian Malcolm ORCID: https://orcid.org/0000-0002-2871-6591 and Schmidt, Karl Michael ORCID: https://orcid.org/0000-0002-0227-3024 2012. On the HELP Inequality for Hill Operators on Trees. Brown, Brian Malcolm, Lang, Jan and Wood, Ian G., eds. Spectral Theory, Function Spaces and Inequalities: New Techniques and Recent Trends, Operator Theory: Advances and Applications, vol. 219. Basel: Springer, pp. 21-36. (10.1007/978-3-0348-0263-5_2)

Bennewitz, C., Brown, Brian Malcolm ORCID: https://orcid.org/0000-0002-2871-6591 and Weikard, R. 2012. Scattering and inverse scattering for a left-definite Sturm–Liouville problem. Journal of Differential Equations 253 (8) , pp. 2380-2419. 10.1016/j.jde.2012.06.016

Brown, Brian Malcolm ORCID: https://orcid.org/0000-0002-2871-6591 and Jais, Mathias 2011. A variational approach to an electromagnetic inverse problem. Inverse Problems 27 (4) , 045011. 10.1088/0266-5611/27/4/045011

Hiscox, Aaron Joseph, Brown, Brian Malcolm ORCID: https://orcid.org/0000-0002-2871-6591 and Marletta, Marco ORCID: https://orcid.org/0000-0003-1546-4046 2010. On the low energy behavior of Regge poles. Journal of Mathematical Physics 51 (10) , 102104. 10.1063/1.3496811

Brown, Brian Malcolm ORCID: https://orcid.org/0000-0002-2871-6591, Langer, Matthias, Marletta, Marco ORCID: https://orcid.org/0000-0003-1546-4046, Tretter, Christine and Wagenhofer, Markus 2010. Eigenvalue enclosures and exclosures for non-self-adjoint problems in hydrodynamics. LMS Journal of Computation and Mathematics 13 , pp. 65-81. 10.1112/S1461157008000466

Brown, Brian Malcolm ORCID: https://orcid.org/0000-0002-2871-6591, Christiansen, Jacob S. and Schmidt, Karl Michael ORCID: https://orcid.org/0000-0002-0227-3024 2009. Spectral properties of a q-Sturm–Liouville Operator. Communications in Mathematical Physics 287 (1) , pp. 259-274. 10.1007/s00220-008-0623-1

Brown, Brian Malcolm ORCID: https://orcid.org/0000-0002-2871-6591, Eastham, M. S. P. and Wood, I . G. 2009. Conditions for the spectrum associated with an asymptotically straight leaky wire to comprise the interval (−∞, ∞). Journal of Physics A: Mathematical and Theoretical 42 (5) , 055207. 10.1088/1751-8113/42/5/055207

Brown, Brian Malcolm ORCID: https://orcid.org/0000-0002-2871-6591, Hoang, Vu, Plum, Michael and Wood, Ian G. 2009. On spectral bounds for photonic crystal waveguides. International Series of Numerical Mathematics 157 , pp. 23-30. 10.1007/978-3-7643-8773-0_3

Bennewitz, C., Brown, Brian Malcolm ORCID: https://orcid.org/0000-0002-2871-6591 and Weikard, R. 2009. Inverse Spectral and Scattering Theory for the Half-Line Left-Definite Sturm-Liouville Problem. SIAM Journal on Mathematical Analysis 40 (5) , pp. 2105-2131. 10.1137/080724575
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Brown, Brian Malcolm ORCID: https://orcid.org/0000-0002-2871-6591, Hinchcliffe, James, Marletta, Marco, Naboko, Serguei and Wood, Ian 2009. The abstract Titchmarsh-Weyl M-function for adjoint operator pairs and its relation to the spectrum. Integral Equations and Operator Theory 63 (3) , pp. 297-320. 10.1007/s00020-009-1668-z

Brown, Brian Malcolm ORCID: https://orcid.org/0000-0002-2871-6591, Grubb, G. and Wood, I. G. 2009. M-functions for closed extensions of adjoint pairs of operators with applications to elliptic boundary problems. Mathematische Nachrichten 282 (3) , pp. 314-347. 10.1002/mana.200810740

Brown, Brian Malcolm ORCID: https://orcid.org/0000-0002-2871-6591, Eastham, M. S. P. and Wood, I. G. 2009. Estimates for the lowest eigenvalue of a star graph. Journal of Mathematical Analysis and Applications 354 (1) , pp. 24-30. 10.1016/j.jmaa.2008.12.014

Hiscox, Aaron Joseph, Brown, Brian Malcolm ORCID: https://orcid.org/0000-0002-2871-6591 and Marletta, M. 2009. Analysis of Regge poles for the Schrodinger equation. Proceedings of The Royal Society. A. Mathematical Physical and Engineering Sciences 465 (2109) , pp. 2813-2823. 10.1098/rspa.2009.0091

Brown, Brian Malcolm ORCID: https://orcid.org/0000-0002-2871-6591, Naboko, Serguei and Weikard, Rudi 2009. The Inverse Resonance Problem for Hermite Operators. Constructive Approximation 30 (2) , pp. 155-174. 10.1007/s00365-008-9037-8

Brown, Brian Malcolm ORCID: https://orcid.org/0000-0002-2871-6591, Marletta, Marco ORCID: https://orcid.org/0000-0003-1546-4046, Naboko, Serguei and Wood, Ian 2008. Boundary triplets and M-functions for non-selfadjoint operators, with applications to elliptic PDEs and block operator matrices. Journal of the London Mathematical Society 77 (3) , pp. 700-718. 10.1112/jlms/jdn006

Brown, Brian Malcolm ORCID: https://orcid.org/0000-0002-2871-6591, Langer, M. and Schmidt, Karl Michael ORCID: https://orcid.org/0000-0002-0227-3024 2008. The HELP inequality on trees. Presented at: Isaac Newton Institute for Mathematical Sciences, Cambridge, UK, 8 January - 29 June 2007. Published in: Exner, P., Keating, J. P., Kuchment, P. A., Sunada, T. and Teplyaev, A. eds. Analysis on Graphs and Its Applications. Proceedings of Symposia in Pure Mathematics (77) Providence, RI: American Mathematical Society, pp. 337-354.

Aumann, S., Brown, Brian Malcolm ORCID: https://orcid.org/0000-0002-2871-6591 and Schmidt, Karl Michael ORCID: https://orcid.org/0000-0002-0227-3024 2008. A Hardy-Littlewood-type inequality for the p-Laplacian. Bulletin of the London Mathematical Society 40 (3) , pp. 525-531. 10.1112/blms/bdn035

Brown, Brian Malcolm ORCID: https://orcid.org/0000-0002-2871-6591, Eastham, M. S. P. and Wood, I. G. 2008. An example on the discrete spectrum of a star graph. Presented at: Isaac Newton Institute for Mathematical Sciences, Cambridge, UK, 8 January - 29 June 2007. Published in: Exner, P., Keating, J. P., Kuchment, P., Sunada, T. and Teplyaev, A. eds. Analysis on graphs and its applications. Proceedings of Symposia in Pure Mathematics (77) Providence, RI: American Mathematical Society, pp. 331-335.

Brown, Brian Malcolm ORCID: https://orcid.org/0000-0002-2871-6591, Eastham, M. S. P. and Wood, I. G. 2008. Conditions for the spectrum associated with an asymptotically straight leaky wire to contain an interval [− α2/4, ∞). Archiv der Mathematik 90 (6) , pp. 554-558. 10.1007/s00013-008-2612-1

Brown, Brian Malcolm ORCID: https://orcid.org/0000-0002-2871-6591 and Eastham, M. S. P. 2008. Titchmarsh's asymptotic formula for periodic eigenvalues and an extension to the p-Laplacian. Journal of Mathematical Analysis and Applications 338 (2) , pp. 1255-1266. 10.1016/j.jmaa.2007.06.017

Brown, Brian Malcolm ORCID: https://orcid.org/0000-0002-2871-6591 and Eastham, M. S. P. 2007. Eigenvalues of the radial p-Laplacian with a potential on (0,∞). Journal of Computational and Applied Mathematics 208 (1) , pp. 111-119. 10.1016/j.cam.2006.10.046

Brown, Brian Malcolm ORCID: https://orcid.org/0000-0002-2871-6591, Lang, J. and Lewis, R.T. 2007. Preface. Journal of computational and applied mathematics 208 (1) , pp. 1-2. 10.1016/j.cam.2006.10.089

Brown, Brian Malcolm ORCID: https://orcid.org/0000-0002-2871-6591 and Eastham, M.S.P. 2007. Bounds for the positive eigenvalues of the p-Laplacian with decaying potential. Journal of Mathematical Analysis and Applications 325 (1) , pp. 734-744. 10.1016/j.jmaa.2006.01.058

Brown, Brian Malcolm ORCID: https://orcid.org/0000-0002-2871-6591 and Evans, William Desmond 2006. Foreword. Journal of Computational and Applied Mathematics 194 (1) , p. 1. 10.1016/j.cam.2005.06.032

Brown, Brian Malcolm ORCID: https://orcid.org/0000-0002-2871-6591 and Eastham, M .S .P. 2006. Extensions of the Kummer evaluation of a finite hypergeometric series. Journal of computational and applied mathematics 194 (1) , pp. 131-140. 10.1016/j.cam.2005.06.018

Brown, Brian Malcolm ORCID: https://orcid.org/0000-0002-2871-6591, Jais, M. and Kalmbach, B. M. 2006. A variational approach to inverse problems for anisotropic systems. Presented at: UAB International Conference on Differential Equations and Mathematical Physics, Birmingham, AL, USA, 29 March - 2 April 2005. Published in: Chernov, Nikolai, Karpeshina, Yulia, Knowles, Ian W., Lewis, Roger T. and Weikard, Rudi eds. Recent Advances in Differential Equations and Mathematical Physics. Contemporary Mathematics (412) Providence, RI: American Mathematical Society, pp. 87-102.

Brown, Brian Malcolm ORCID: https://orcid.org/0000-0002-2871-6591 and Eastham, M. S. P. 2006. A note on the Dixon formula for a finite hypergeometric series. Korean Journal of Computational and Applied Mathematics 194 (1) , pp. 173-175. 10.1016/j.cam.2005.06.021

Brown, Brian Malcolm ORCID: https://orcid.org/0000-0002-2871-6591 and Weikard, Rudi 2005. A Borg-Levinson theorem for trees. Proceedings of The Royal Society A Mathematical physical and engineering sciences 461 (2062) , pp. 3231-3243. 10.1098/rspa.2005.1513

Brown, Brian Malcolm ORCID: https://orcid.org/0000-0002-2871-6591 and Christiansen, Jacob S. 2005. On the Krein and Friedrichs extensions of a positive Jacobi operator. Expositiones Mathematicae 23 (2) , pp. 179-186. 10.1016/j.exmath.2005.01.020

Brown, Brian Malcolm ORCID: https://orcid.org/0000-0002-2871-6591, Naboko, S. and Weikard, R. 2005. The inverse resonance problem for Jacobi operators. Bulletin of the London Mathematical Society 37 (05) , pp. 727-737. 10.1112/S0024609305004674

Brown, Brian Malcolm ORCID: https://orcid.org/0000-0002-2871-6591, Jais, Mathias and Knowles, I. W. 2005. A variational approach to an elastic inverse problem. Inverse Problems 21 (6) , pp. 1953-1973. 10.1088/0266-5611/21/6/010

Brown, Brian Malcom ORCID: https://orcid.org/0000-0002-2871-6591 and Evans, William Desmond 2004. Preface [Editorial]. Journal of Computational and Applied Mathematics 171 (1-2) , ix. 10.1016/j.cam.2004.01.004

Brown, Brian Malcolm ORCID: https://orcid.org/0000-0002-2871-6591 and Reichel, W. 2004. Eigenvalues of the radially symmetric p-Laplacian in Rn. Journal of the London Mathematical Society 69 (3) , pp. 657-675. 10.1112/S002461070300512X

Brown, Brian Malcolm ORCID: https://orcid.org/0000-0002-2871-6591 and Marletta, Marco ORCID: https://orcid.org/0000-0003-1546-4046 2004. Spectral inclusion and spectral exactness for PDEs on exterior domains. IMA Journal of Numerical Analysis 24 (1) , pp. 21-43. 10.1093/imanum/24.1.21

Brown, Brian Malcolm ORCID: https://orcid.org/0000-0002-2871-6591, Eastham, Michael S. P., Hinz, Andreas M. and Schmidt, Karl Michael ORCID: https://orcid.org/0000-0002-0227-3024 2004. Distribution of eigenvalues in gaps of the essential spectrum of Sturm-Liouville operators - a numerical approach. Journal Of Computational Analysis And Applications 6 (1) , pp. 85-95.

Brown, Brian Malcolm ORCID: https://orcid.org/0000-0002-2871-6591 and Eastham, M. S. P. 2004. Extended Hurwitz results for hypergeometric functions arising in spectral theory. Journal of Computational and Applied Mathematics 171 (1-2) , pp. 113-121. 10.1016/j.cam.2004.01.006

Brown, Brian Malcolm ORCID: https://orcid.org/0000-0002-2871-6591 and Weikard, R. 2004. The inverse resonance problem for perturbations of algebro-geometric potentials. Inverse Problems 20 (2) , pp. 481-494. 10.1088/0266-5611/20/2/011

Brown, Brian Malcolm ORCID: https://orcid.org/0000-0002-2871-6591, Eastham, M. S. P. and Evans, William Desmond 2004. Laudatum. Journal of computational and applied mathematics 171 (1-2) , xi-xiii. 10.1016/j.cam.2004.01.034

Brown, Brian Malcolm ORCID: https://orcid.org/0000-0002-2871-6591, Knowles, I. and Weikard, Rudi 2003. On the inverse resonance problem. Journal of the London Mathematical Society 68 (2) , pp. 383-401. 10.1112/S0024610703004654

Brown, Brian Malcolm ORCID: https://orcid.org/0000-0002-2871-6591, Evans, William Desmond and Plum, Michael 2003. Titchmarsh-Sims-Weyl theory for complex Hamiltonian systems. Proceedings of the London Mathematical Society 87 (2) , pp. 419-450. 10.1112/S0024611503014096

Brown, Brian Malcolm ORCID: https://orcid.org/0000-0002-2871-6591 and Marletta, Marco ORCID: https://orcid.org/0000-0003-1546-4046 2001. Spectral inclusion and spectral exactness for singular non-self-adjoint Sturm-Liouville problems. Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 457 (2005) , pp. 117-139. 10.1098/rspa.2000.0659

Brown, Brian Malcolm ORCID: https://orcid.org/0000-0002-2871-6591, Jimack, P. K. and Mihajlović, M D. 2001. An efficient direct solver for a class of mixed finite element problems. Applied Numerical Mathematics 38 (1-2) , pp. 1-20. 10.1016/S0168-9274(00)00048-9

Brown, Brian Malcolm ORCID: https://orcid.org/0000-0002-2871-6591, Davies, E. B., Jimack, P. K. and Mihajlovic, M. D. 2000. A numerical investigation of the solution of a class of fourth-order eigenvalue problems. Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 456 (1998) , pp. 1505-1521. 10.1098/rspa.2000.0573

Brown, Brian Malcolm ORCID: https://orcid.org/0000-0002-2871-6591 and Kirby, V. G. 2000. A computational investigation of an integro-differential inequality with periodic potential. Journal of Inequalities and Applications 5 (4) , pp. 321-342. 10.1155/S1025583400000163
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Brown, Brian Malcolm ORCID: https://orcid.org/0000-0002-2871-6591, Eastham, M. S. P., Hinz, A. M., Kriecherbauer, Thomas, McCormack, Daniel K. R. and Schmidt, Karl Michael ORCID: https://orcid.org/0000-0002-0227-3024 1998. Welsh Eigenvalues of radially periodic Schrödinger operators. Journal of Mathematical Analysis and Applications 225 (1) , pp. 347-357. 10.1006/jmaa.1998.6048

Beynon, Malcolm James ORCID: https://orcid.org/0000-0002-5757-270X, Brown, Brian Malcolm ORCID: https://orcid.org/0000-0002-2871-6591 and Evans, William Desmond 1993. On an Inequality of the Kolmogorov Type for a Second-Order Differential Expression. Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 442 (1916) , pp. 555-569. 10.1098/rspa.1993.0121

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