%0 Journal Article
%A P. A. Shvartsman
%T A contribution to the theory of standard systems of differential equations of positive type with periodic coefficients
%J Doklady Akademii Nauk
%D 1966
%P 1019-1022
%V 168
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1966_168_5_a12/
%G ru
%F DAN_1966_168_5_a12