@article{DE_1988_24_4_a33,
     author = {O. V. Khramtsov},
     title = {On the tree points controllability of the linear complete integrable {Pfaff} systems},
     journal = {Differencialʹnye uravneni\^a},
     pages = {726--727},
     publisher = {mathdoc},
     volume = {24},
     number = {4},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1988_24_4_a33/}
}