%0 Journal Article
%A P. A. Frolov
%T Connected components of real elliptic systems on the plane
%J Doklady Akademii Nauk
%D 1968
%P 1350-1353
%V 181
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1968_181_6_a13/
%G ru
%F DAN_1968_181_6_a13