@article{MZM_2009_85_1_a14,
     author = {V. A. Kyrov},
     title = {Criterion for the {Nondegeneracy} of a {Transformation} {Group}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {144--146},
     publisher = {mathdoc},
     volume = {85},
     number = {1},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2009_85_1_a14/}
}