DILDABEK, G.; IVANOVA, M. B.; SADYBEKOV, M. A. ON ROOT FUNCTIONS OF NONLOCAL DIFFERENTIAL SECOND-ORDER OPERATOR WITH BOUNDARY CONDITIONS OF PERIODIC TYPE. Journal of Mathematics, Mechanics and Computer Science, [S. l.], v. 112, n. 4, 2021. DOI: 10.26577/JMMCS.2021.v112.i4.03. Disponível em: https://bm.kaznu.kz/index.php/kaznu/article/view/963. Acesso em: 22 dec. 2024.