MANSOURI, Bouzid; ARDJOUNI, Abdelouaheb; DJOUDI, Ahcene. Periodicity and stability in neutral nonlinear differential equations by Krasnoselskii‘s fixed point theorem. CUBO, A Mathematical Journal, [S. l.], v. 19, n. 3, p. 15–29, 2017. DOI: 10.4067/S0719-06462017000300015. Disponível em: https://cubo.ufro.cl/index.php/cubo/article/view/1626. Acesso em: 5 mar. 2026.