@article{TM_2006_253_a0,
     author = {V. K. Beloshapka and V. V. Ezhov and G. Schmalz},
     title = {Vitushkin's {Germ} {Theorem} for {Engel-Type} {CR} {Manifolds}},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {7--13},
     publisher = {mathdoc},
     volume = {253},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_2006_253_a0/}
}