@article{SEMR_2005_2_a20,
     author = {A. S. Pavlenko},
     title = {Symmetries and solutions to equations of two-dimensional motions of polytropic gas},
     journal = {Sibirskie \`elektronnye matemati\v{c}eskie izvesti\^a},
     pages = {291--307},
     publisher = {mathdoc},
     volume = {2},
     year = {2005},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/SEMR_2005_2_a20/}
}