BEREZOVSKY, A. A.; MITROPOLSKIY, Yu. A. Problems with free boundaries and nonlocal problems for nonlinear parabolic equations. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 49, n. 1, p. 84–97, 1997. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4988. Acesso em: 5 dec. 2025.