@article{DE_2002_38_3_a10,
     author = {V. I. Lahno and A. M. Samoilenko},
     title = {Group {Classification} of {Nonlinear} {Evolution} {Equations:} {I.~Invariance} {Under} {Semisimple} {Local} {Transformation} {Groups}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {365--372},
     publisher = {mathdoc},
     volume = {38},
     number = {3},
     year = {2002},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2002_38_3_a10/}
}