%0 Journal Article
%A L. V. Hörmander
%T Differential equations without solutions
%J Matematika
%D 1961
%P 115-120
%V 5
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MAT_1961_5_5_a5/
%G ru
%F MAT_1961_5_5_a5