GASIŃSKI, L.; PAPAGEORGIOU, N. S. Multiple Solutions for Nonlinear Dirichlet Problems with Concave Terms. MATHEMATICA SCANDINAVICA, [S. l.], v. 113, n. 2, p. 206–247, 2013. DOI: 10.7146/math.scand.a-15570. Disponível em: https://www.mscand.dk/article/view/15570. Acesso em: 26 apr. 2024.