@article{DAN_1976_229_4_a10,
     author = {A. I. Leonov},
     title = {On the {Korteweg{\textendash}de} {Vries} equations in the nonlinear theory of surface- and internal waves},
     journal = {Doklady Akademii Nauk},
     pages = {820--823},
     year = {1976},
     volume = {229},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1976_229_4_a10/}
}