@article{DE_1988_24_2_a19,
     author = {A. V. Boltyanskii},
     title = {Normal local controllability of objects that can be described by a system of second-order differential equations with one control parameter},
     journal = {Differencialʹnye uravneni\^a},
     pages = {341--342},
     publisher = {mathdoc},
     volume = {24},
     number = {2},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1988_24_2_a19/}
}