@article{DAN_1970_195_4_a13,
     author = {L. A. Ostrovsky and E. N. Pelinovsky},
     title = {Averaging method for nonsinusoidal waves},
     journal = {Doklady Akademii Nauk},
     pages = {804--806},
     publisher = {mathdoc},
     volume = {195},
     number = {4},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1970_195_4_a13/}
}