ISKANADJIEV, I. Approximation of The Lower Operator in Nonlinear Differential Games with Non-Fixed Time. JOURNAL OF ADVANCES IN MATHEMATICS, [S. l.], v. 16, p. 8348–8358, 2019. DOI: 10.24297/jam.v16i0.8220. Disponível em: https://rajpub.com/index.php/jam/article/view/8220. Acesso em: 17 jun. 2024.