PARASIDIS, I.N.; PROVIDAS, E. Factorization method for solving nonlocal boundary value problems in Banach space. Bulletin of the Karaganda University. Mathematics Series, [S. l.], v. 103, n. 3, p. 76–86, 2021. DOI: 10.31489/2021m3/76-86. Disponível em: https://mts.buketov.edu.kz/index.php/mathematics-vestnik/article/view/465. Acesso em: 4 jul. 2025.