MESMOULI, Mouataz Billah; ARDJOUNI, Abdelouaheb; DJOUDI, Ahcene. Periodicity of solutions for a system of nonlinear integro-differential equations. Sarajevo Journal of Mathematics, [S. l.], v. 11, n. 1, p. 49–63, 2015. DOI: 10.5644/SJM.11.1.04. Disponível em: https://sjm.anubih.ba/index.php/sjm/article/view/536. Acesso em: 7 dec. 2025.