TY - JOUR AU - G. Ya. Areshkin TI - Cauchy directions and extensions of regular spaces JO - Doklady Akademii Nauk PY - 1961 SP - 9 EP - 12 VL - 137 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1961_137_1_a0/ LA - ru ID - DAN_1961_137_1_a0 ER -