TY - JOUR AU - E. V. Radkevich AU - B. O. Èshonkulov TI - On the existence of the classical solution of the problem of JO - Doklady Akademii Nauk PY - 1992 SP - 668 EP - 673 VL - 325 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1992_325_4_a4/ LA - ru ID - DAN_1992_325_4_a4 ER -