%0 Journal Article
%A A. V. Sarychev
%T The index of the second variation of a control system
%J Sbornik. Mathematics
%D 1982
%P 383-401
%V 41
%N 3
%U http://geodesic.mathdoc.fr/item/SM_1982_41_3_a3/
%G en
%F SM_1982_41_3_a3