Boichuk О. A.; KRIVOSHEYA, S. A.; SAMOILENKO, A. M. Boundary-Value problems for systems of integro-differential equations with Degenerate Kernel. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 48, n. 11, p. 1576–1579, 1996. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5213. Acesso em: 5 dec. 2025.