MISHURA, Yu. S. Existence of solutions of abstract volterra equations in a banach space and its subsets. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 52, n. 5, p. 648–657, 2000. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4459. Acesso em: 5 dec. 2025.