Gottwald, Siegfried Foundations of a set theory for fuzzy sets. 40 years of development. (English) Zbl 1171.03030 Int. J. Gen. Syst. 37, No. 1, 69-81 (2008). Reviewer: Vilém Novák (Ostrava) MSC: 03E72 PDFBibTeX XMLCite \textit{S. Gottwald}, Int. J. Gen. Syst. 37, No. 1, 69--81 (2008; Zbl 1171.03030) Full Text: DOI
Perfilieva, Irina; Gottwald, Siegfried Solvability and approximate solvability of fuzzy relation equations. (English) Zbl 1059.03060 Int. J. Gen. Syst. 32, No. 4, 361-372 (2003). Reviewer: George S. Stavrakakis (Chania) MSC: 03E72 41A30 PDFBibTeX XMLCite \textit{I. Perfilieva} and \textit{S. Gottwald}, Int. J. Gen. Syst. 32, No. 4, 361--372 (2003; Zbl 1059.03060) Full Text: DOI
Gottwald, Siegfried; Novák, Vilém An approach toward consistency degrees of fuzzy theories. (English) Zbl 0961.03023 Int. J. Gen. Syst. 29, No. 4, 499-510 (2000). Reviewer: Salvatore Sessa (Napoli) MSC: 03B52 PDFBibTeX XMLCite \textit{S. Gottwald} and \textit{V. Novák}, Int. J. Gen. Syst. 29, No. 4, 499--510 (2000; Zbl 0961.03023) Full Text: DOI