@article{DAN_1988_300_4_a12,
     author = {S. V. Emel'yanov and S. K. Korovin and S. V. Nikitin},
     title = {Investigation of controllability by methods of the theory of approximation groups and systems on a foliation},
     journal = {Doklady Akademii Nauk},
     pages = {821--823},
     publisher = {mathdoc},
     volume = {300},
     number = {4},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1988_300_4_a12/}
}