@article{JMAG_2007_3_1_a1,
     author = {E. A. Gorin},
     title = {The {Cartan} lemma by {B.} {Ya.~Levin} and its applications},
     journal = {\v{Z}urnal matemati\v{c}eskoj fiziki, analiza, geometrii},
     pages = {13--38},
     year = {2007},
     volume = {3},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/JMAG_2007_3_1_a1/}
}