On the Existence of Positive Solutions of Quasilinear Elliptic Equations with Mixed Boundary Conditions. Journal of Partial Differential Equations, [S. l.], v. 5, n. 3, p. 61–71, 1992. Disponível em: https://gsp.tricubic.dev/jpde/article/view/3719. Acesso em: 15 mar. 2026.