1. Hajek, P.: Mathematics of fuzzy logic. Kluwer Academic Publisher, Boston (1998)
2. Klir, G.J., Yuan, B.: Fuzzy sets and fuzzy logic: Theory and Applications. Prentice-Hall of India, India (1997)
3. Nguyen, N.T, Malowiecki, M.: Consistency Measures for Conflict Profiles. Transactions on Rough Sets 1, 169–186 (2004)
4. Novotný, M., Pawlak, Z.: Partial Dependency of Attributes. Bull. Polish Acad. of Sci. math. 36, 453–458 (1988)
5. Pawlak, Z.: Rough Sets. Internal Journal of Information and Computer Science 11, 341–356 (1982)