[1] R. P. Agarwal, D. O’Regan and D. R. Sahu, Fixed Point Theory for Lipschitzian-Type Mappings with Applications, Springer, Heidelberg (2003).
[2] I. Beg, Inequalities in metric spaces with applications, Topol. Methods Nonlinear Anal. 17 (2001), 183-190.
[3] I. Beg, Structure of the set of fixed points of nonexpansive mappings on convex metric spaces, Ann. Univ. Marie Curie-Sklodowska Sec. A LII (1998), 7-14.
[4] I. Beg and M. Abbas, Fixed points and best approximation in Menger convex metric spaces Arch. Math, 41 (2005), 389-397.
[5] I. Beg and A. Azam, Fixed point on star-shaped subsets of convex metric spaces, Indian J. Pure. Appl. Math. 18 (1987), 594-596.
[6] I. Beg, A. Azam, F. Ali and T. Minhas, Some fixed point theorems in convex metric spaces, Rend. Cric. Math. Palermo(2). XL (1991), 307-315.
[7] J. Li. Z. Chen, Common fixed-points for Banach operator pairs in best approxi-mation, J. Math. Anal. Appl. 336 (2007), 1466-1475.
[8] R. Chugh and S. Kumar, Common fixed points for weakly compatible maps, Proc.Indian Acad. Sci. Math. Sci. 111 (2001), 241-247.
[9] L. Ciric,On some discontinuous fixed point theorems in convex metric spaces,Czechoslov. Math. J. 43:188(1993),319-326.
[10] M. D. Guay, K. L. Singh and J. H. M. Whitfield, Fixed point theorems for nonex-pansive mappings in convex metric spaces, Proceedings, Conference on Nonlinear Analysis, Marcel Dekker Inc., New York, 80 (1982), 179-189.
[11] R. H. Haghi, S. H. Rezapour and N. Shahzad, Some fixed point generalizations are not real generalizations, Nonlinear Anal. 74 (2011), 1799-1803.
[12] N. Hussian, Common fixed points in best approximation for Banach operator pairs with Ciric type I-contractions, J. Math. Anal. Appl. 338 (2008), 1351-1363.
[13] N. Hussian, M. Abbas and J. K. Kim, Common fixed point and invariant approx-imation in Menger convex metric spaces, Bull. Korean Math. Soc. 48 (2008),671-680.
[14] G. Jungck, Common fixed point theorems for compatible self maps of Hausdorff topological spaces, Fixed Point Theory Appl. 3 (2005), 355-363.
[15] G. Jungck, Common fixed points for commuting and compatible maps on com-pacta, Proc. Amer. Math. Soc. 103 (1988), 978-983.
[16] G. Jungck, Compatible mappings and common fixed points, Internat. J. Math. Sci. 9 (1986), 771-779.
[17] G. Jungck and B. E. Rhoades, Fixed point for set valued functions without con-tinuity, Indian J. Pure Appl. Math. 29(3) (1998), 227-238.
[18] M. Moosaei, Fixed point theorems in convex metric spaces, Fixed Point Theory Appl, 2012, Article ID 164 (2012).
[19] R. P. Pant, Common fixed points of noncommuting mappings, J. Math. Anal. Appl. 188 (1994), 436-440.
[20] S. Sessa, On a weak commutativity condition of mappings in fixed point consid-erations, Publ. Inst. Math. 32 (1982), 149-153.
[21] T. Shimizu and W. Takahashi, Fixed point theorems in certain convex metric spaces, Math. Japon. 37 (1992), 855-859.
[22] T. Takahashi, A convexity in metric spaces and nonexpansive mapping I, Kodai Math. Sem. Rep. 22 (1970), 142-149.
)