%0 Journal Article
%A I. Ya. Roitberg
%T Elliptic boundary value problems for general systems of equations
%J Doklady Akademii Nauk
%D 1997
%P 25-29
%V 354
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1997_354_1_a5/
%G ru
%F DAN_1997_354_1_a5