TY - JOUR AU - Ya. I. Sekerzh-Zen'kovich TI - On the theory of free finite oscillations of a surface separating two unbounded heavy liquids of different densities JO - Doklady Akademii Nauk PY - 1961 SP - 51 EP - 54 VL - 136 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1961_136_1_a12/ LA - ru ID - DAN_1961_136_1_a12 ER -