Koen Maes Bernard De Baets Triple Rotation: Gymnastics for t-norms. 47-52 2007 EUSFLAT Conf. (1) http://www.eusflat.org/publications/proceedings/EUSFLAT_2007/papers/Maes_Koen_(122).pdf conf/eusflat/2007-1 db/conf/eusflat/eusflat2007-1.html#MaesB07