A Viterbo-Hofer-Zehnder type result for hamiltonian inclusions Xianling Fan — 1991 Annales de la Faculté des sciences de Toulouse : Mathématiques
A classification scheme for positive solutions to second order nonlinear iterative differential equations. Fan, Xianling; Li, Wan-Tong; Zhong, Chengkui — 2000 Electronic Journal of Differential Equations (EJDE) [electronic only]