Flavio Chierichetti Alessandro Panconesi Prabhakar Raghavan Mauro Sozio Alessandro Tiberi Eli Upfal Finding near neighbors through cluster pruning. 103-112 2007 conf/pods/2007 PODS http://doi.acm.org/10.1145/1265530.1265545 db/conf/pods/pods2007.html#ChierichettiPRSTU07