TY - JOUR AU - A. K. Urinov AU - K. T. Karimov TI - The Dirichlet problem for a three-dimensional equation of mixed type with three singular coefficients JO - Journal of Samara State Technical University, Ser. Physical and Mathematical Sciences PY - 2017 SP - 665 EP - 683 VL - 21 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/VSGTU_2017_21_4_a4/ LA - ru ID - VSGTU_2017_21_4_a4 ER -