Nonclassical symmetries of a system of nonlinear reaction-diffusion equations. Neliniini Kolyvannya, [S. l.], v. 20, n. 4, p. 451–457, 2017. Disponível em: https://nosc.imath.kiev.ua/index.php/nosc/article/view/881. Acesso em: 12 apr. 2026.