Stein, William E. A note on convexity and fuzzy random variables. (English) Zbl 0524.60005 BUSEFAL 14, 43-46 (1983). MSC: 60A99 03E72 60F15 PDFBibTeX XMLCite \textit{W. E. Stein}, BUSEFAL 14, 43--46 (1983; Zbl 0524.60005)
Spal, Jindrich Fundamentals of a mathematical theory of fuzzy sets. (English) Zbl 0505.94033 Apl. Mat. 27, 326-340 (1982). MSC: 94D05 03B52 PDFBibTeX XMLCite \textit{J. Spal}, Apl. Mat. 27, 326--340 (1982; Zbl 0505.94033) Full Text: EuDML
Spal, J. Modified fuzzy sets. (English) Zbl 0473.03046 Probl. Control Inf. Theory 10, 375-386 (1981). MSC: 03E72 94D05 PDFBibTeX XMLCite \textit{J. Spal}, Probl. Control Inf. Theory 10, 375--386 (1981; Zbl 0473.03046)
Höhle, Ulrich Representation theorems for L-fuzzy quantities. (English) Zbl 0448.03041 Fuzzy Sets Syst. 5, 83-107 (1981). MSC: 03E72 60A99 PDFBibTeX XMLCite \textit{U. Höhle}, Fuzzy Sets Syst. 5, 83--107 (1981; Zbl 0448.03041) Full Text: DOI
Zadeh, L. A. The concept of a linguistic variable and its application to approximate reasoning. III. (English) Zbl 0404.68075 Inf. Sci. 9, 43-80 (1975). MSC: 68T37 03B52 94D05 PDFBibTeX XMLCite \textit{L. A. Zadeh}, Inf. Sci. 9, 43--80 (1975; Zbl 0404.68075) Full Text: DOI