%0 Journal Article
%A Jones, John jr.
%T On oscillatory solutions of second order differential systems
%J Portugaliae mathematica
%D 1970
%P 125-133
%V 29
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/PORMA_1970__29_2_115117/
%G en
%F PORMA_1970__29_2_115117