KAADOUD, M. C. Résolution de problémes de rafle et application á un probléme de frottement. Topological Methods in Nonlinear Analysis, [S. l.], v. 18, n. 1, p. 89–102, 2001. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2001.025. Acesso em: 22 jul. 2024.