BECZEK, Jan. Solutions of a nonlinear Dirichlet problem in which the nonlinear part is bounded from above and below by polynomials. Mathematical Modelling and Analysis, [S. l.], v. 2, n. 1, p. 35–40, 1997. DOI: 10.3846/13926292.1997.9637064. Disponível em: https://journals.vilniustech.lt/index.php/MMA/article/view/10007. Acesso em: 1 jul. 2025.