%0 Journal Article %A V. I. Petviashvili %T Instability of ideal liquid flow with free surface %J Doklady Akademii Nauk %D 1977 %P 787-789 %V 234 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1977_234_4_a14/ %G ru %F DAN_1977_234_4_a14