@article{DAN_1988_299_3_a5,
     author = {V. F. Zaitsev},
     title = {Discrete-group analysis of ordinary differential equations},
     journal = {Doklady Akademii Nauk},
     pages = {542--545},
     publisher = {mathdoc},
     volume = {299},
     number = {3},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1988_299_3_a5/}
}