%0 Journal Article
%A V. I. Gorbachuk
%A M. L. Gorbachuk
%T On boundary-value problems for a first-order differential equation with operator coefficients and the expansion in eigenfunctions of this equation
%J Doklady Akademii Nauk
%D 1973
%P 1268-1271
%V 208
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1973_208_6_a1/
%G ru
%F DAN_1973_208_6_a1