1. G. De Rham, Sur quelques courbes définies par des équations fonctionelles, Rend. Sem. Mat. Univ. Politec. Torino
16 (1956) 101–113.
2. J. Fodor and M. Roubens, Fuzzy Preference Modelling and Multicriteria Decision Support ( Kluwer, Dordrecht, 1994 ).
3. J.C. Fodor, R.R. Yager and A. Rybalov, Structure of uni-norms, Inf. Sci. (to appear).
4. L.W. Fling and K.S. Pu, “An axiomatic approach to rational decision making in a fuzzy environment”, in: Fuzzy Sets and Their Applications to Cognitive and Decision Processes, eds. L.A. Zadeh et al. ( Academic Press, New York, 1975 ) pp. 227–256.
5. C.H. Ling, Representation of associative functions, Publ. Math. Debrecen
12 (1965) 182–212.