AGARWAL, P.; JABEEN, T.; LUPULESCU, V.; O’REGAN, D. Existence of global solutions for some classes of integral equations. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 70, n. 1, p. 130–148, 2018. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/1546. Acesso em: 5 dec. 2025.