%0 Journal Article
%A Ligęza, Jan
%T On the existence of one-signed periodic solutions of some differential equations of second order
%J Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica
%D 2006
%P 119-134
%V 45
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/AUPO_2006__45_1_a11/
%G en
%F AUPO_2006__45_1_a11