ISLAM, Muhammad N.; RAFFOUL, Youssef N. Bounded Solutions and Periodic Solutions of Almost Linear Volterra Equations. CUBO, A Mathematical Journal, [S. l.], v. 11, n. 3, p. 115–124, 2009. Disponível em: https://cubo.ufro.cl/index.php/cubo/article/view/1466. Acesso em: 7 dec. 2025.