Summary: The notion of coupled fixed point is introduced by T. G. Bhaskar
and V. Lakshmikantham
[Nonlinear Anal., Theory Methods Appl. 65, No. 7 (A), 1379–1393 (2006; Zbl 1106.47047
)]. In this manuscript, some results of V. Lakshmikantham
and Lj. Ćirić [Nonlinear Anal., Theory Methods Appl. 70, No. 12 (A), 4341–4349 (2009; Zbl 1176.54032
)] are extended to the class of cone metric spaces.