Suffcient conditions for existence of solutions of a lower dimensional variational problem. São Paulo Journal of Mathematical Sciences, [S. l.], v. 5, n. 1, p. 37–51, 2011. DOI: 10.11606/issn.2316-9028.v5i1p37-51. Disponível em: https://www.revistas.usp.br/spjournal/article/view/67.. Acesso em: 7 maio. 2024.