ASHYRALYYEV, C.; AKYUZ, G. On fourth order accuracy stable difference scheme for a multi-point overdetermined elliptic problem. Bulletin of the Karaganda University. Mathematics Series, [S. l.], v. 102, n. 2, p. 45–53, 2021. DOI: 10.31489/2021m2/45-53. Disponível em: http://mts.buketov.edu.kz/index.php/mathematics-vestnik/article/view/411. Acesso em: 6 oct. 2025.