TY - JOUR AU - A. M. Ezhov AU - S. P. Pul'kin TI - Estimation of the solution of the Tricomi problem for a certain class of equations of mixed type JO - Doklady Akademii Nauk PY - 1970 SP - 978 EP - 980 VL - 193 IS - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1970_193_5_a3/ LA - ru ID - DAN_1970_193_5_a3 ER -