%0 Journal Article
%A Liu,  Li
%A Li,  Xiangao
%A Zhuang,  Kejun
%T Bifurcation analysis on a delayed SIS epidemic model with stage structure
%J Electronic journal of differential equations
%D 2007
%V 2007
%U http://geodesic.mathdoc.fr/item/EJDE_2007__2007__a69/
%G en
%F EJDE_2007__2007__a69