@article{MZM_1997_61_6_a14,
     author = {V. V. Ezhov and G. Schmalz},
     title = {A simple proof of the {Beloshapka} theorem on the parametrization of the automorphism group of a {CR} manifold},
     journal = {Matemati\v{c}eskie zametki},
     pages = {939--942},
     publisher = {mathdoc},
     volume = {61},
     number = {6},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1997_61_6_a14/}
}