@article{DAN_1964_156_3_a13,
     author = {K. P. Surovikhin},
     title = {Group classification of the equations describing one-dimensional unsteady motion of a gas},
     journal = {Doklady Akademii Nauk},
     pages = {533--536},
     publisher = {mathdoc},
     volume = {156},
     number = {3},
     year = {1964},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1964_156_3_a13/}
}