TY - JOUR AU - Yu. P. Apakov TI - A three-dimensional analog of the Tricomi problem for a~parabolic-hyperbolic equation JO - Sibirskij žurnal industrialʹnoj matematiki PY - 2011 SP - 34 EP - 44 VL - 14 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/SJIM_2011_14_2_a4/ LA - ru ID - SJIM_2011_14_2_a4 ER -