1. Ansari, A.H. , Note on ϕ-ψ- -contractive type mappings and related fixed point, The 2nd Regional Conference on Mathematics and Applications, Payame Noor University (2014), 377--380.
2. Dhage, B.C., Generalized metric spaces and mapping with fixed point, Bull. Calcutta Math. Soc. 84 (1992), 329--336.
3. Fisher, B., A fixed point mapping, Bull. Calcutta Math. Soc. 68 (1976), 265--266.
4. Delbosco, D., Un'estensione di un teorema sul punto di S. Reich, Rend. Sem. Mat. Univers. Politecn. Torino 35 (1967), 233--238.
5. Guo, D. and Lakshmikantham, V., Coupled fixed points of nonlinear operators with applications, Nonlinear Analysis 11 (1987), 623--632.