IMANBAEV, N. S.; SADYBEKOV, M. A. Construction of a characteristic determinant for one type of eigenvalue problems under integral perturbation of two boundary conditions. Journal of Mathematics, Mechanics and Computer Science, [S. l.], v. 104, n. 4, p. 12–23, 2019. DOI: 10.26577/JMMCS-2019-4-m2. Disponível em: https://bm.kaznu.kz/index.php/kaznu/article/view/673. Acesso em: 3 jul. 2024.