SUN, D.; ZHANG, G. Computing the topological degrees via semi-concave functionals. Topological Methods in Nonlinear Analysis, [S. l.], v. 39, n. 1, p. 107–117, 2012. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2012.007. Acesso em: 22 jul. 2024.