TY - JOUR AU - Ya. I. Zhitomirskii TI - Exact classes of uniqueness of solution of the Cauchy problem for equations of second order JO - Doklady Akademii Nauk PY - 1966 SP - 29 EP - 32 VL - 171 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1966_171_1_a5/ LA - ru ID - DAN_1966_171_1_a5 ER -