Boundary-value problems for differential equations in a Banach space with an unbounded operator in the linear part. Neliniini Kolyvannya, [S. l.], v. 16, n. 4, p. 518–526, 2013. Disponível em: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/718. Acesso em: 21 jan. 2026.