Zohreh Asgharzadeh Talebi Rada Chirkova Yahya Fathi Matthias Stallmann Exact and inexact methods for selecting views and indexes for OLAP performance improvement. 311-322 2008 EDBT http://doi.acm.org/10.1145/1353343.1353383 conf/edbt/2008 db/conf/edbt/edbt2008.html#TalebiCFS08