%0 Journal Article
%A Andres, Jan
%T Periodic solutions of the third-order differential equation with right-hand side in the form of nonlinear restoring term plus general gradient-like part
%J Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica
%D 1991
%P 143-148
%V 30
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/AUPO_1991__30_1_a12/
%G en
%F AUPO_1991__30_1_a12