TRUDINGER, Neil S.; WANG, Xu-Jia. Hessian measures I. Topological Methods in Nonlinear Analysis, [S. l.], v. 10, n. 2, p. 225–239, 1997. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.1997.030. Acesso em: 8 jul. 2025.