1. Fuzzy class theory;Běhounek;Fuzzy Sets and Systems,2005
2. From fuzzy logic to fuzzy mathematics: a methodological manifesto;Běhounek;Fuzzy Sets and Systems,2006
3. L. Běhounek, P. Cintula, Fuzzy class theory: a primer v1.0, Technical Report V-939, Institute of Computer Science, Academy of Sciences of the Czech Republic, Prague, 2006, Available at 〈www.cs.cas.cz/research/library/reports_900.shtml〉.
4. Equations with fuzzy numbers;Biacino;Inform. Sci.,1989
5. Solving linear and quadratic fuzzy equations;Buckley;Fuzzy Sets and Systems,1990