Qiming Chen Umeshwar Dayal Meichun Hsu OLAP-based Scalable Profiling of Customer Behavior. 55-64 http://link.springer.de/link/service/series/0558/bibs/1676/16760055.htm 1999 conf/dawak/1999 DaWaK db/conf/dawak/dawak99.html#ChenDH99