@article{DAN_1986_287_5_a4,
     author = {A. B. Kurzhanskii},
     title = {Analytic description of a bundle of viable trajectories of a differential system},
     journal = {Doklady Akademii Nauk},
     pages = {1047--1050},
     year = {1986},
     volume = {287},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1986_287_5_a4/}
}