20831 Stephan Carlson: The quest for a fuzzy Tychonoff theorem. Am. Math. Monthly 115/10, 871-887. C.L. Chang: Fuzzy topological spaces. J. Math. Analysis appl. 24 (1968), 182-190. M. Frank: Probabilistic topological spaces. J. Math. Analysis appl. 34 (1971), 67-81. J. Goguen: The fuzzy Tychonoff theorem. J. Math. Analysis appl. 43 (1973), 734-742. 6271 Ulrich Hoehle: Probabilistische Topologien. Manuscripta Math. 26 (1978), 223-245. 6273 Ulrich Hoehle: Probabilistisch kompakte L-unscharfe Mengen. Manuscripta Math. 26 (1979), 331-356. R. Lowen: Fuzzy topological spaces and fuzzy compactness. J. Math. Analysis appl. 56 (1976), 621-633. R. Lowen: Initial and final fuzzy topologies and the fuzzy Tychonoff theorem. J. Math. Analysis appl. 58 (1977), 11-21. Palaniappan: Fuzzy topology. Ca. 2002. Berthold Schweizer: Multiplications on the space of probability distribution functions. Aequationes Math. 12 (1975), 156-183. Berthold Schweizer/A. Sklar: Probabilistic metric spaces. North-Holland 1983.