@article{DAN_1976_227_2_a12,
     author = {A. G. Butkovskiy},
     title = {Application of certain results from number theory to the finite control and controllability problem in distributed systems},
     journal = {Doklady Akademii Nauk},
     pages = {309--311},
     publisher = {mathdoc},
     volume = {227},
     number = {2},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1976_227_2_a12/}
}