LANCELOTTI, S.; MARZOCCHI, M. Lagrangian systems with Lipschitz obstacle on manifolds. Topological Methods in Nonlinear Analysis, [S. l.], v. 27, n. 2, p. 229–253, 2006. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2006.009. Acesso em: 24 apr. 2024.