%0 Journal Article
%A Andres, Ján
%A Vlček, Vladimír
%T Note to the existence of periodic solutions for higher-order differential equations with nonlinear restoring term and time-variable coefficients
%J Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica
%D 1991
%P 149-157
%V 30
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/AUPO_1991__30_1_a13/
%G en
%F AUPO_1991__30_1_a13