1. R. Engelking, General Topology, PWN-Polish Sci. Publ., Warsaw, 1977.
2. On some results in fuzzy metric spaces;George;Fuzzy Sets and Systems,1994
3. On some results of analysis for fuzzy metric spaces;George;Fuzzy Sets and Systems,1997
4. Fixed points in fuzzy metric spaces;Grabiec;Fuzzy Sets and Systems,1989
5. J.L. Kelley, General Topology, Van Nostrand, 1955.