%0 Journal Article
%A N. A. Shananin
%T An example of a~locally unsolvable differential equation of quasiprincipal type with a~real-valued weighted principal symbol
%J Matematičeskie zametki
%D 1976
%P 755-761
%V 19
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MZM_1976_19_5_a10/
%G ru
%F MZM_1976_19_5_a10