Assanova A, Uteshova R. Dulat Syzdykbekovich Dzhumabaev. Life and scientific activity (dedicated to the 70th birthday anniversary). M [Internet]. 2024 Jun. 28 [cited 2025 Aug. 25];114(2):221-43. Available from: http://mts.buketov.edu.kz/index.php/mathematics-vestnik/article/view/753