1. BENTLEY H.L., HERRLICH H., ROBERTSON W.A.: Convenient Categories for Topologists. Preprint
2. BOONE J.R., SHELDON W.D., GRUENHAGE G.: Cardinal functions for K-spaces. Proc. Amer. Math. Soc.68, 355–358 (1978)
3. BROWN R.: Ten Topologies for XxY. Quart. J. Math. (2)14, 303–319 (1963)
4. BOURBAKI N.: General Topology. Part 2 Reading, Massachusetts: Addison-Wesley 1966.
5. DUGUNDGJI J.: Topology. Boston: Allyn and Bacon 1966