Local and global bifurcations in an SIRS epidemic model. - Zigen Song; Jian Xu 005; Qunhong Li (Appl. Math. Comput., 2009)

Existence and stability of the grazing periodic trajectory in a two-degree-of-freedom vibro-impact system. - Jieqiong Xu; Qunhong Li; Nan Wang (Appl. Math. Comput., 2011)