@article{DAN_1979_246_4_a21,
     author = {W. I. Fushchych},
     title = {On a new method of the investigation of group properties of the mathematical physic equations},
     journal = {Doklady Akademii Nauk},
     pages = {846--850},
     publisher = {mathdoc},
     volume = {246},
     number = {4},
     year = {1979},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1979_246_4_a21/}
}