Unique solvability of the boundary-value problems for nonlinear fractional functional-differential equations. Neliniini Kolyvannya, [S. l.], v. 24, n. 1, p. 17–27, 2021. Disponível em: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/1012. Acesso em: 10 dec. 2025.