KIRILICH, V. M. Non-local Stefan-type problem for the hyperbolic first order system . Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 40, n. 1, p. 121–124, 1987. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/9069. Acesso em: 5 dec. 2025.