1. Dependency structures of data base relationships;Armstrong,1974
2. Computational problems related to the design of normal form relational schemas;Beeri;ACM Trans. Database Syst.,1979
3. Fuzzy Relational Systems: Foundations and Principles;Belohlavek,2002
4. Axiomatizations of fuzzy attribute logic;Belohlavek,2005
5. Attribute implications in a fuzzy setting;Belohlavek,2006