1. Bourbaki, N.,Elements of Mathematics, General Topology, Part 2, Addison-Wesley, Reading, Mass., 1966.
2. Dugundji, J.,Topology, Allyn and Bacon, Inc., Boston, Mass., 1966.
3. Hu, S.,Homotopy Theory, Academic Press, New York, 1959.
4. Magill, K. D., Jr, ‘Near-rings of continuous selfmaps: A brief survey and some open problems’,Proc. Conf. on Near-Rings and Near-fields, San Benedetto del Tronto, 1981.
5. Magill, K. D., Jr, ‘Near-ring-semigroups of continuous selfmaps’,Bull. Austral. Math. Soc.
37 (2) (1988), 277–291.