%0 Journal Article
%A V. P. Didenko
%T Some systems of differential equations of mixed type
%J Doklady Akademii Nauk
%D 1962
%P 709-712
%V 144
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1962_144_4_a4/
%G ru
%F DAN_1962_144_4_a4