MUGBIL, A. Nonexistence results for a system of nonlinear fractional integro-differential equations. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 75, n. 4, p. 478–490, 2023. DOI: 10.37863/umzh.v75i4.6902. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/6902. Acesso em: 11 apr. 2025.