BAZALII, B. V.; TEDEEV, A. F. Method for symmetrization and estimation of solutions of the Neumann problem for the equation of a porous medium in domains with noncompact boundary for infinitely increasing time. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 47, n. 2, p. 147–157, 1995. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5398. Acesso em: 5 dec. 2025.