@article{DAN_1969_188_3_a11,
     author = {A. G. Butkovskiy},
     title = {Finite control over distributed linear systems},
     journal = {Doklady Akademii Nauk},
     pages = {538--541},
     publisher = {mathdoc},
     volume = {188},
     number = {3},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1969_188_3_a11/}
}