@article{IIMI_2015_2_a26,
     author = {A. H. Hammady},
     title = {On properties of characteristics of attainability set for a control system},
     journal = {Izvestiya Instituta Matematiki i Informatiki Udmurtskogo Gosudarstvennogo Universiteta},
     pages = {216--227},
     year = {2015},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IIMI_2015_2_a26/}
}