Andrey Balmin Fatma Özcan Kevin S. Beyer Roberta Cochrane Hamid Pirahesh A Framework for Using Materialized XPath Views in XML Query Processing. 60-71 2004 conf/vldb/2004 VLDB db/conf/vldb/vldb2004.html#BalminOBCP04 http://www.vldb.org/conf/2004/RS2P2.PDF