1. Adlassnig KP. A survey on medical diagnosis and fuzzy subsets. In: Gupta MM, Sanchez E, editors. Approximate reasoning in decision analysis. Amsterdam: North-Holland, 1982. pp. 203–217.
2. Fuzzy models — what are they and why?;Bezdek;IEEE Trans. Fuzzy Syst.,1993
3. INSPEC ONDISK database. IEE, London, 1986–1996.
4. Cardiovascular investigations and fuzzy set theory;Kalmanson;Am. J. Cardiol.,1975
5. Maiers JE. Fuzzy set theory and medicine: the first twenty years and beyond. In: Proceedings of the 9th Symposium on Computer Applications in Medical Care. IEEE, 1985. pp. 325–329.