%0 Journal Article %A D. O. Tsvetkov %T The problem of normal oscillations of a viscous stratified fluid with an elastic membrane %J Vestnik Udmurtskogo universiteta. Matematika, mehanika, kompʹûternye nauki %D 2021 %P 311-330 %V 31 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/VUU_2021_31_2_a10/ %G ru %F VUU_2021_31_2_a10