@article{DE_1992_28_3_a7,
     author = {N. N. Petrov},
     title = {Completely controllable dynamical polysystems},
     journal = {Differencialʹnye uravneni\^a},
     pages = {423--428},
     publisher = {mathdoc},
     volume = {28},
     number = {3},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1992_28_3_a7/}
}