ASHYRALYEV, A.; SOZEN, Y.; HEZENCI, F. A remark on elliptic differential equations on manifold. Bulletin of the Karaganda University. Mathematics Series, [S. l.], v. 99, n. 3, p. 75–85, 2020. DOI: 10.31489/2020m3/75-85. Disponível em: https://mts.buketov.edu.kz/index.php/mathematics-vestnik/article/view/388. Acesso em: 7 jul. 2025.