References
- Krasnoselskii, M. A., 1964. Positive Solutions of Operator Equations. Noordhoff Grongingen; 1964.
- Ladas, G., and Lakshmikantham, V., 1972. Differential Equations in Abstract Spaces. New York: Academic Press; 1972.
- Petryshyn, W. V., and Williamson, Jr, T. E., 1973. Strong and weak convergence of the sequence of successive approximations for quasi-nonexpansive mappings, J. Math. Anal, and Appl 43 (1973), pp. 459–497.