Riečan, B. (1997). Fuzzy sets. Theory and applications ([1st ed.].). Mathematical Institute of the Slovak Academy of Sciences.
Citace podle Chicago (17th ed.)Riečan, Beloslav. Fuzzy Sets. Theory and Applications. [1st ed.]. Bratislava: Mathematical Institute of the Slovak Academy of Sciences, 1997.
Citace podle MLA (9th ed.)Riečan, Beloslav. Fuzzy Sets. Theory and Applications. [1st ed.]. Mathematical Institute of the Slovak Academy of Sciences, 1997.
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