@article{IIMI_2006_2_a15,
     author = {V. V. Lukyanov},
     title = {Positional control problems for nonstationary systems},
     journal = {Izvestiya Instituta Matematiki i Informatiki Udmurtskogo Gosudarstvennogo Universiteta},
     pages = {69--72},
     year = {2006},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IIMI_2006_2_a15/}
}