%0 Journal Article %A D. O. Tsvetkov %T Small motions of an ideal stratified fluid with a free surface completely covered with the elastic ice %J Sibirskie èlektronnye matematičeskie izvestiâ %D 2018 %P 422-435 %V 15 %I mathdoc %U http://geodesic.mathdoc.fr/item/SEMR_2018_15_a89/ %G ru %F SEMR_2018_15_a89