BURTON, T. A.; ZHANG, B. Bounded and periodic solutions of integral equations. CUBO, A Mathematical Journal, [S. l.], v. 14, n. 1, p. 55–79, 2012. DOI: 10.4067/S0719-06462012000100006. Disponível em: https://cubo.ufro.cl/ojs/index.php/cubo/article/view/1354. Acesso em: 18 may. 2024.