Siegfried Gottwald Some general considerations on the evaluation of fuzzy rule systems. 639-644 2005 EUSFLAT Conf. http://www.eusflat.org/publications/proceedings/EUSFLAT-LFA_2005/papers/S106-02.pdf conf/eusflat/2005 db/conf/eusflat/eusflat2005.html#Gottwald05