@article{DE_1988_24_7_a29,
     author = {O. V. Khramtsov},
     title = {Controllability of a class of linear nonstationary completely integrable {Pfaff} systems},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1281--1282},
     publisher = {mathdoc},
     volume = {24},
     number = {7},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1988_24_7_a29/}
}