Shuliang Wang Wenzhong Shi Hanning Yuan Guoqing Chen Attribute Uncertainty in GIS Data. 614-623 2005 conf/fskd/2005-2 FSKD (2) http://dx.doi.org/10.1007/11540007_76 db/conf/fskd/fskd2005-2.html#WangSYC05