@article{DE_1987_23_8_a2,
     author = {A. B. Kurzhanskii and T. F. Filippova},
     title = {Description of the pencil of viable trajectories of a control system},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1303--1315},
     publisher = {mathdoc},
     volume = {23},
     number = {8},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1987_23_8_a2/}
}