Craig J. Bunker Latha S. Colby Richard L. Cole William J. McKenna Gopal Mulagund David Wilhite Aggregate Maintenance for Data Warehousing in Informix Red Brick Vista. 659-662 http://www.vldb.org/conf/2001/P659.pdf 2001 conf/vldb/2001 VLDB db/conf/vldb/vldb2001.html#BunkerCCMMW01