%0 Journal Article
%A Bartušek, Miroslav
%T Monotonicity theorems concerning differential equations $y''+f(t,y,y')=0$
%J Archivum mathematicum
%D 1976
%P 169-178
%V 12
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/ARM_1976__12_4_a0/
%G en
%F ARM_1976__12_4_a0