1. On nonlinear contractions;Boyd;Proc. Amer. Math. Soc.,1969
2. Principle of weakly contractive maps in Hilbert space;Alber,1997
3. Some theorems on weakly contractive maps;Rhoades;Nonlinear Anal.,2001
4. Common fixed point and invariant approximation results for noncommuting generalized (f,g)-nonexpansive maps;Hussain;J. Math. Anal. Appl.,2006
5. Coincidence points for noncommuting f-weakly contractive mappings;Song;Int. J. Comput. Appl. Math.,2007