Automorphisms, negations and implication operators. - Humberto Bustince Sola; Pedro J. Burillo; F. Soria (Fuzzy Sets Syst., 2003)

Weak Fuzzy S-Subsethood Measures: Overlap Index. - Humberto Bustince Sola; Edurne Barrenechea Tartas; Miguel Pagola; F. Soria (Int. J. Uncertain. Fuzziness Knowl. Based Syst., 2006)