%0 Journal Article %A N. D. Kopachevskii %A D. O. Tsvetkov %T Oscillations of stratified fluids %J Contemporary Mathematics. Fundamental Directions %D 2008 %P 103-130 %V 29 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMFD_2008_29_a6/ %G ru %F CMFD_2008_29_a6