JENALIYEV, M.T.; YERGALIYEV, M.G.; SHARIPOV, K.S. On a family of spectral problems for fourth-order ordinary differential operators. Bulletin of the Karaganda University. Mathematics Series, [S. l.], v. 123, n. 3, p. 99–108, 2026. DOI: 10.31489/2026m3/99-108. Disponível em: https://mts.buketov.edu.kz/mathematics-vestnik/article/view/1267. Acesso em: 30 sep. 2026.