Application of the Method of Decomposition into Exponential Series by the Spectral Parameter in Eigenvalue Problems. Kazakh Mathematical Journal, [S. l.], v. 25, n. 1, p. 6–15, 2025. DOI: 10.70474/kmj-25-1-01. Disponível em: https://mathjournal.kz/index.php/kmj/article/view/15. Acesso em: 31 jan. 2025.