@article{TIMM_2011_17_1_a5,
     author = {M. I. Gusev},
     title = {On external estimates for reachable sets of nonlinear control systems},
     journal = {Trudy Instituta matematiki i mehaniki},
     pages = {60--69},
     publisher = {mathdoc},
     volume = {17},
     number = {1},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TIMM_2011_17_1_a5/}
}