%0 Journal Article
%A A. V. Ivanov
%T On some second order elliptic systems
%J Zapiski Nauchnykh Seminarov POMI
%D 1971
%P 34-41
%V 21
%I mathdoc
%U http://geodesic.mathdoc.fr/item/ZNSL_1971_21_a2/
%G ru
%F ZNSL_1971_21_a2