GRANAS, A.; LASSONDE, M. Some elementary general principles of convex analysis. Topological Methods in Nonlinear Analysis, [S. l.], v. 5, n. 1, p. 23–37, 1995. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.1995.002. Acesso em: 23 apr. 2024.