@article{DE_2002_38_4_a6,
     author = {A. A. Abramenko and V. I. Lahno and A. M. Samoilenko},
     title = {Group {Classification} of {Nonlinear} {Evolutionary} {Equations:} {II.~Invariance} {Under} {Solvable} {Groups} of {Local} {Transformations}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {482--489},
     publisher = {mathdoc},
     volume = {38},
     number = {4},
     year = {2002},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2002_38_4_a6/}
}