CLARKE, F. Continuity of solutions to a basic problem in the calculus of variations. ANNALI SCUOLA NORMALE SUPERIORE - CLASSE DI SCIENZE, [S. l.], v. 4, n. 3, p. 511-530, 2009. DOI: 10.2422/2036-2145.2005.3.06. Disponível em: http://20.103.181.36/index.php/annaliscienze/article/view/77. Acesso em: 19 jun. 2025.