ASHYRALYEV, A.; HAMAD, A. Numerical solution of the nonlocal boundary value problem for elliptic equations. Bulletin of the Karaganda University. Mathematics Series, [S. l.], v. 91, n. 3, p. 99–107, 2018. DOI: 10.31489/2018m3/99-107. Disponível em: https://mts.buketov.edu.kz/index.php/mathematics-vestnik/article/view/299. Acesso em: 10 jul. 2025.