@article{DE_1977_13_9_a17,
     author = {V. S. Dryuma},
     title = {A group interpretation of nonlinear wave equations that are integrable by the method of the inverse problem of scattering theory},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1713--1715},
     publisher = {mathdoc},
     volume = {13},
     number = {9},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1977_13_9_a17/}
}