@article{DAN_1968_180_5_a11,
     author = {A. G. Butkovskiy},
     title = {Problems of finite control of linear systems with lumped parameters},
     journal = {Doklady Akademii Nauk},
     pages = {1056--1059},
     publisher = {mathdoc},
     volume = {180},
     number = {5},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1968_180_5_a11/}
}