BARANETSKIJ, Ya.O.; DEMKIV, I.I.; SOLOMKO, A.V.; SUS', O.M. Nonlocal multipoint problem for a differential equation of $2n$-th order with operator coefficients. Carpathian Mathematical Publications, [S. l.], v. 13, n. 2, p. 501–514, 2021. DOI: 10.15330/cmp.13.2.501-514. Disponível em: https://vps.pnu.edu.ua/index.php/cmp/article/view/4998. Acesso em: 22 nov. 2024.