POPOVICH, R. O. On the symmetry and exact solutions of a certain transport equation. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 47, n. 1, p. 121–125, 1995. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5392. Acesso em: 11 apr. 2025.