1. Beg, I., Shahzad, N. and Iqbal, M., Fixed Point Theorems and Best Approximation in Convex Metric Spaces, Approx. Theory and its Appl., 8(1992), 97–105.
2. Brosowski, B., Fixpunktsatz in der Approximationstheorie, Mathematica (Cluj), 11(1969), 195–220.
3. Dotson, W. G., Fixed Point Theorems for Nonexpansive Mappings on Starshaped Subsets of Banach Spaces, J. London Math. Soc., 4(1972), 408–410.
4. Guay, M. D., Singh, K. L. and Whitfield, J. M. H., Fixed Point Theorems for Nonexpansive Mappings in Convex Metric Spaces, Proc. Conference on Nonlinear Analysis (Ed. S.P. Singh and J.H. Bury) Marcel Dekker, 80(1982), 179–189.
5. Hicks, T. L. and Humphires, M. D., A Note on Fixed Point Theorems, J. Approx. Theory, 34(1982), 221–225.