%0 Journal Article
%A Etgen, Garret J.
%A Lewis, Roger T.
%T A Hille-Wintner comparison theorem for second order differential systems
%J Czechoslovak Mathematical Journal
%D 1980
%P 98-107
%V 30
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1980.101659/
%R 10.21136/CMJ.1980.101659
%G en
%F 10_21136_CMJ_1980_101659