SHARAF, K. An existence result for a nonlinear boundary value problem via topological arguments. Topological Methods in Nonlinear Analysis, [S. l.], v. 48, n. 1, p. 31–43, 2016. DOI: 10.12775/TMNA.2016.034. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2016.034. Acesso em: 22 jul. 2024.