MASLOV, V. P.; SAMBORSKY, S. N. Boundary-value problems for stationary Hamilton-Jacobi and Bellman equations. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 49, n. 3, p. 433–447, 1997. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5016. Acesso em: 14 apr. 2025.