%0 Journal Article %A A. V. Sarychev %T Stability of mappings of Hilbert space and equivalence of controlled systems %J Sbornik. Mathematics %D 1982 %P 127-138 %V 41 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1982_41_1_a7/ %G en %F SM_1982_41_1_a7