Ronald Fagin Benny Kimelfeld Yunyao Li Sriram Raghavan Shivakumar Vaithyanathan Rewrite rules for search database systems. 271-282 2011 PODS http://doi.acm.org/10.1145/1989284.1989322 conf/pods/2011 db/conf/pods/pods2011.html#FaginKLRV11