Sandra Sandri Christophe Sibertin-Blanc A multicriteria System Using Gradual Fuzzy Rules and Fuzzy Arithmetic. 17-34 2008 16 International Journal of Uncertainty, Fuzziness and Knowledge-Based Systems Supplement-1 http://dx.doi.org/10.1142/S0218488508005224 db/journals/ijufks/ijufks16.html#SandriS08