Gao Cong Wenfei Fan Floris Geerts Xibei Jia Shuai Ma Improving Data Quality: Consistency and Accuracy. 315-326 2007 conf/vldb/2007 VLDB http://www.vldb.org/conf/2007/papers/research/p315-cong.pdf db/conf/vldb/vldb2007.html#CongFGJM07