@article{DE_2004_40_12_a5,
     author = {I. V. Roublev},
     title = {Attainability sets in cascade control systems},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1636--1644},
     publisher = {mathdoc},
     volume = {40},
     number = {12},
     year = {2004},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2004_40_12_a5/}
}