Existence of solutions to n -th order neutral dynamic equations on time scales. Li, Qiaoluan; Zhang, Zhenguo — 2010 Electronic Journal of Differential Equations (EJDE) [electronic only]
Existence of non-oscillatory solutions to higher-order mixed difference equations. Li, Qiaoluan; Liang, Haiyan; Dong, Wenlei; Zhang, Zhenguo — 2007 Electronic Journal of Differential Equations (EJDE) [electronic only]
Throughout positive solutions of second-order nonlinear differential equations. Zhang, Zhenguo; Wang, Chunjiao; Li, Qiaoluan; Li, Fang — 2005 Electronic Journal of Differential Equations (EJDE) [electronic only]