1. Agarwal RP, Hussain N, Taoudi M-A: Fixed point theorems in ordered Banach spaces and applications to nonlinear integral equations. Abstr. Appl. Anal. 2012., 2012: Article ID 245872
2. Abbas M, Vetro P: Invariant approximation results in cone metric spaces. Ann. Funct. Anal. 2011, 2: 101–113.
3. Abbas M, Vetro P, Khan SH: On fixed points of Berinde’s contractive mappings in cone metric spaces. Carpath. J. Math. 2010, 26: 121–133.
4. Abusalim SM, Md Noorani MS: Fixed point and common fixed point theorems on ordered cone b -metric spaces. Abstr. Appl. Anal. 2013., 2013: Article ID 815289
5. Altun I, Durmaz G: Some fixed point theorems on ordered cone metric spaces. Rend. Circ. Mat. Palermo 2009, 58: 319–325. 10.1007/s12215-009-0026-y