%0 Journal Article
%A S. A. Vakhrameev
%T The Morse index theorem for extremals of some optimal control
%J Doklady Akademii Nauk
%D 1991
%P 11-15
%V 317
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1991_317_1_a0/
%G ru
%F DAN_1991_317_1_a0