%0 Journal Article
%A M. M. Khrustalev
%T Necessary and sufficient conditions for an optimal control problem
%J Doklady Akademii Nauk
%D 1973
%P 59-62
%V 211
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1973_211_1_a13/
%G ru
%F DAN_1973_211_1_a13