@article{DAN_1977_234_4_a14,
     author = {V. I. Petviashvili},
     title = {Instability of ideal liquid flow with free surface},
     journal = {Doklady Akademii Nauk},
     pages = {787--789},
     publisher = {mathdoc},
     volume = {234},
     number = {4},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1977_234_4_a14/}
}