BARANETSKIJ, Ya.O.; KALENYUK, P.I.; KOPACH, M.I.; SOLOMKO, A.V. The nonlocal boundary value problem with perturbations of mixed boundary conditions for an elliptic equation with constant coefficients. II. Carpathian Mathematical Publications, [S. l.], v. 12, n. 1, p. 173–188, 2020. DOI: 10.15330/cmp.12.1.173-188. Disponível em: https://journals.pnu.edu.ua/index.php/cmp/article/view/3902. Acesso em: 24 apr. 2024.