KARIMOV, K.T.; MURODOVA, M.R. Dirichlet type boundary value problem for an elliptic equation with three singular coefficients in the first octant. Bulletin of the Karaganda University. Mathematics Series, [S. l.], v. 119, n. 3, p. 164–175, 2025. DOI: 10.31489/2025m3/164-175. Disponível em: https://mts.buketov.edu.kz/index.php/mathematics-vestnik/article/view/878. Acesso em: 5 oct. 2025.