%0 Journal Article
%A V. K. Romanko
%T On boundary value problems for differential operator equations that are not solved for the highest derivative
%J Doklady Akademii Nauk
%D 1977
%P 1030-1033
%V 235
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1977_235_5_a10/
%G ru
%F DAN_1977_235_5_a10