Radial Solutions of Free Boundary Problems for Degenerate Parabolic Equations. Journal of Partial Differential Equations, [S. l.], v. 3, n. 1, p. 47–68, 1990. Disponível em: https://www.global-sci.com/index.php/jpde/article/view/3651. Acesso em: 6 dec. 2025.