%0 Journal Article
%A K. B. Sabitov
%T Interior and boundary extremum principles for a class of elliptic systems
%J Trudy Matematicheskogo Instituta imeni V.A. Steklova
%D 1989
%P 216-217
%V 44
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/RM_1989_44_5_a19/
%G en
%F RM_1989_44_5_a19