Karimov K, Murodova M. Dirichlet type boundary value problem for an elliptic equation with three singular coefficients in the first octant. M [Internet]. 2025 Sep. 30 [cited 2025 Oct. 5];119(3):164-75. Available from: https://mts.buketov.edu.kz/index.php/mathematics-vestnik/article/view/878