SEROV, N. I.; CHERNIGA, R. M. Lie Symmetries, Q-Conditional Symmetries, and Exact Solutions of Nonlinear Systems of Diffusion-Convection Equations. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 55, n. 10, p. 1340–1355, 2003. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4006. Acesso em: 7 apr. 2025.