TY - JOUR AU - I. N. Rodionova AU - V. M. Dolgopolov TI - A similar for $\Delta_1$ problem for the second-order hyperbolic equation in the 3D Euclidean space JO - Journal of Samara State Technical University, Ser. Physical and Mathematical Sciences PY - 2015 SP - 697 EP - 709 VL - 19 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/VSGTU_2015_19_4_a8/ LA - ru ID - VSGTU_2015_19_4_a8 ER -