%0 Journal Article
%A S. B. Rukhlina
%T A Class of Extremal Problems for Partial Differential Equations
%J Differencialʹnye uravneniâ
%D 2002
%P 102-110
%V 38
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_2002_38_1_a15/
%G ru
%F DE_2002_38_1_a15