Weakly perturbed boundary-value problems for Fredholm integral equations with degenerated kernel in Banach spaces. Neliniini Kolyvannya, [S. l.], v. 20, n. 4, p. 488–501, 2017. Disponível em: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/885. Acesso em: 8 dec. 2025.