title: approximating multi-dimensional aggregate range queries over real attributes carlotta domeniconi , vassilis j. tsotras , george kollios , dimitrios gunopulos sigmod conference. authors: nan. venue: nan. year: 2000.0
title: progressive approximate aggregate queries with a multi-resolution tree structure 2001. authors: iosif lazaridis , sharad mehrotra. venue: international conference on management of data. year: nan