References
- Assad , N.A. and Kirk , W.A. 1972 . Fixed point theorems for set-valued mappings of contractive type . Pacific J. Math , 43 : 553 – 562 .
- Bellman , R. 1973 . Methods of Non-linear Analysis , New York : Academic Press .
- Bhakta , P.C. and Sumitra , Mitra . 1984 . Some existence theorems for functional equations arising in Dynamic Programming . Journ. Math. Anal. Appl , 98 : 348 – 3662 .
- Browder , F.E. 1968 . On the convergence of successive approximations for non-linear functional equations . Nedrl, Akad. Wetensch. Proc.Ser A , 71 : 27 – 35 .
- Subrahmanyam , P.V. 1980 . An operator equation in a Tychonoff space . Aeq. Math , 20 : 166 – 169 .
- Tan , K.K. 1972 . Fixed point theorems for non-expansive mappings . Pacific J. Math , 41 : 829 – 842 .