%0 Journal Article
%A I. S. Kac
%T Behaviour of spectral functions of differential systems with boundary conditions at a singular endpoint
%J Doklady Akademii Nauk
%D 1964
%P 34-37
%V 157
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1964_157_1_a7/
%G ru
%F DAN_1964_157_1_a7