Positive solutions for singular three-point boundary-value problems. Zhao, Zengqin — 2007 Electronic Journal of Differential Equations (EJDE) [electronic only]
Existence and uniqueness of smooth positive solutions to a class of singular m -point boundary value problems. Du, Xinsheng; Zhao, Zengqin — 2009 Boundary Value Problems [electronic only]
On fixed point theorems of mixed monotone operators. Du, Xinsheng; Zhao, Zengqin — 2011 Fixed Point Theory and Applications [electronic only]
On existence and uniqueness of positive solutions for integral boundary boundary value problems. Mao, Jinxiu; Zhao, Zengqin; Xu, Naiwei — 2010 Electronic Journal of Qualitative Theory of Differential Equations [electronic only]
The existence and uniqueness of positive solutions for integral boundary value problems. Mao, Jinxiu; Zhao, Zengqin; Xu, Naiwei — 2011 Bulletin of the Malaysian Mathematical Sciences Society. Second Series