%0 Journal Article
%A Ray Redheffer
%A Roger Dell
%T Sharp Lower Bounds for Solutions on Nonlinear Differential Inequalities.
%J Mathematische Zeitschrift
%D 1972
%P 199-216
%V 127
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MZ_1972__127_171768/
%F MZ_1972__127_171768