PAPAGEORGIOU, N. S.; ZHANG, C. Existence of positive solutions for nonlinear Robin problems with gradient dependence. Annales Fennici Mathematici, [S. l.], v. 44, n. 2, p. 739–753, 2019. DOI: 10.5186/aasfm.2019.4437. Disponível em: https://afm.journal.fi/article/view/135818. Acesso em: 22 nov. 2024.