DINCA, G.; GOELEVEN, D. Periodic solutions for evolution complementarity systems: a method of guiding functions. Topological Methods in Nonlinear Analysis, [S. l.], v. 27, n. 2, p. 255–267, 2006. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2006.010. Acesso em: 23 apr. 2024.