NikitinA. G. (2007) “Group classification of systems of nonlinear reaction-diffusion equations with triangular diffusion matrix”, Ukrains’kyi Matematychnyi Zhurnal, 59(3), pp. 395–411. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/3315 (Accessed: 11October2024).