Jon Williams Nigel Steele Imprecision of the elements of fuzzy eigenvectors of pairwise comparison matrices in fuzzy AHP. 131-134 2001 EUSFLAT Conf. http://www.eusflat.org/publications/proceedings/EUSFLAT_2001/papers/131_Williams.pdf conf/eusflat/2001 db/conf/eusflat/eusflat2001.html#WilliamsS01