%0 Journal Article
%A Ya. A. Roitberg
%A Z. G. Sheftel
%T Optimal control of systems described by general elliptic problems
%J Differencialʹnye uravneniâ
%D 1979
%P 1075-1087
%V 15
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1979_15_6_a13/
%G ru
%F DE_1979_15_6_a13