TY - JOUR AU - V. A. Kazinskii TI - On time variations of second derivatives of gravitational potential JO - Doklady Akademii Nauk PY - 1970 SP - 790 EP - 792 VL - 192 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1970_192_4_a18/ LA - ru ID - DAN_1970_192_4_a18 ER -