%0 Journal Article
%A A. S. Matveev
%T On the necessary conditions for an extremum in an optimal control problem with phase constraints
%J Differencialʹnye uravneniâ
%D 1987
%P 629-640
%V 23
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1987_23_4_a8/
%G ru
%F DE_1987_23_4_a8