por Janko, Wolfgang H [editor] | Roubens, Marc [editor] | Zimmermann, Hans Jurgen, 1934- [editor] | Joint IFSA-EC and EURO-WGFS Workshop on Progress in Fuzzy Sets in Europe (2 : 1989 : Vienna, Austria).
por Georgescu, Irina [autor].
por Sugeno, Michio, 1940- [autor] | Nguyen, Hung T, 1944- [editor] | Prasad, Nadipuram R [editor].