1. Fixed point theorems for certain classes of nonexpansive mappings;Belluce,1969
2. Normed Linear Spaces;Day,1962
3. Sur les fonctionelles continues;Fréchet;Ann. École Normale,1910
4. Functional Analysis in Normed Spaces;Kantorovich,1964
5. A fixed point theorem for mappings which do not increase distances;Kirk;Amer. Math. Monthly,1965