TY - JOUR AU - V. I. Voytitsky AU - N. D. Kopachevskii TI - Normal oscillations of a pendulum with a cavity partially filled with an ideal incompressible fluid JO - Itogi nauki i tehniki. Sovremennaâ matematika i eë priloženiâ. Tematičeskie obzory PY - 2021 SP - 34 EP - 49 VL - 190 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/INTO_2021_190_a3/ LA - ru ID - INTO_2021_190_a3 ER -