%0 Journal Article
%A S. R. Umarov
%T On the well-posedness of systems of pseudodifferential equations
%J Doklady Akademii Nauk
%D 1991
%P 835-839
%V 318
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1991_318_4_a15/
%G ru
%F DAN_1991_318_4_a15