%0 Journal Article
%A R. S. Saks
%T Weakly elliptic systems of pseudodifferential equations on a manifold without boundary
%J Doklady Akademii Nauk
%D 1978
%P 786-789
%V 240
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1978_240_4_a7/
%G ru
%F DAN_1978_240_4_a7