@article{DAN_1963_148_6_a8,
     author = {I. D. Kochubievskiy and G. M. Ulanov},
     title = {Information theoretical conditions for invariance of linear control systems},
     journal = {Doklady Akademii Nauk},
     pages = {1268--1270},
     publisher = {mathdoc},
     volume = {148},
     number = {6},
     year = {1963},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1963_148_6_a8/}
}