%0 Journal Article %A V. I. Voytitsky %A N. D. Kopachevskii %T Normal oscillations of a pendulum with a cavity partially filled with an ideal incompressible fluid %J Itogi nauki i tehniki. Sovremennaâ matematika i eë priloženiâ. Tematičeskie obzory %D 2021 %P 34-49 %V 190 %I mathdoc %U http://geodesic.mathdoc.fr/item/INTO_2021_190_a3/ %G ru %F INTO_2021_190_a3