@article{DE_1973_9_12_a29,
     author = {B. Sh. Shklyar},
     title = {The minimal number of inputs of a controllable system},
     journal = {Differencialʹnye uravneni\^a},
     pages = {2284},
     publisher = {mathdoc},
     volume = {9},
     number = {12},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1973_9_12_a29/}
}