Light-like Extremal Surfaces in Minkowski Space R1+(1+n). Journal of Partial Differential Equations, [S. l.], v. 23, n. 2, p. 158–167, 2010. DOI: 10.4208/jpde.v23.n2.3. Disponível em: https://www.global-sci.com/index.php/jpde/article/view/4160. Acesso em: 5 dec. 2025.