%0 Journal Article
%A Bingwen Liu
%T Existence and uniqueness of periodic solutions for
  a kind of Duffing equation with two deviating arguments
%J Annales Polonici Mathematici
%D 2006
%P 247-258
%V 89
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/ap89-3-2/
%R 10.4064/ap89-3-2
%G en
%F 10_4064_ap89_3_2