1. Bellmann, R.E., Zadeh, L.A.: Local and fuzzy logic. In: Dunn, J.M., Epstein, G. (eds.) Modern Uses of Multiple-Valued Logic, pp. 103–165. Reidel, Dordrecht (1977)
2. Birkhoff, G.: Lattice theory. American Mathematical Society, Providence (1973)
3. De Baets, B., Fodor, J.: Residual operators of uninorms. Soft Computing 3, 89–100 (1999)
4. Fodor, J., Rubens, M.: Fuzzy Preference Modeling and Multi-criteria Decision Support. Kluwer Academic Publishers, Dordrecht (1994)
5. Fodor, J., (1996), Fuzzy Implications, Proc. Of International Panel Conference on Soft and Intelligent Computing, Budapest, ISBN 963 420 510 0, pp. 91-98. 21] J., Fodor, B., De Baets, T., Calvo, Structure of uninorms with given continuous underlying t-norms and t-conorms, Proc. of the 24th Linz Seminar on Fuzzy Sets, 2003.