@article{DAN_1989_308_1_a20,
     author = {A. G. Megrabov},
     title = {Determining exact group-invariant solutions by means of the method},
     journal = {Doklady Akademii Nauk},
     pages = {84--87},
     year = {1989},
     volume = {308},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1989_308_1_a20/}
}