@article{DE_1980_16_3_a1,
     author = {V. I. Korobov and Nguyen Khoa Shon},
     title = {$\sigma $-controllability of linear autonomous systems in the presence of constraints on the control},
     journal = {Differencialʹnye uravneni\^a},
     pages = {395--404},
     publisher = {mathdoc},
     volume = {16},
     number = {3},
     year = {1980},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1980_16_3_a1/}
}