@article{DAN_1968_180_2_a8,
     author = {V. A. Yakubovich},
     title = {Impulse control systems with width modulation},
     journal = {Doklady Akademii Nauk},
     pages = {290--293},
     publisher = {mathdoc},
     volume = {180},
     number = {2},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1968_180_2_a8/}
}