ASHYRALYEV, A.; SADYBEKOV, M. Recent advances in PDE and their applications. Preface. Bulletin of the Karaganda University. Mathematics Series, [S. l.], v. 102, n. 2, p. 4, 2021. Disponível em: http://mts.buketov.edu.kz/index.php/mathematics-vestnik/article/view/474. Acesso em: 18 aug. 2025.