1. A. Amo, D. Gómez, J. Montero and G. Biging (2001): Relevance and redundancy in fuzzy classification systems. Mathware and Soft Computing 8:203–216.
2. A. Amo, J. Montero, G. Biging and V. Cutello (2004): Fuzzy classification systems. European Journal of Operational Research 156:459–507.
3. A. Amo, J. Montero and V. Cutello (1999): On the principles of fuzzy classification. Proc. NAFIPS Conference. IEEE Press, Piscataway, NJ; pp. 675–679.
4. A. Amo, J. Montero, A. Fernàndez, M. López, J. Tordesillas and G. Biging (2002): Spectral fuzzy classification, an application. IEEE Trans on Systems, Man and Cybernetics, Part C, 32:42–48.
5. K.J. Arrow (1951, 1964): Social Choice and Individual Values. Wiley, New York.