Nikos Karayannidis Aris Tsois Timos K. Sellis Roland Pieringer Volker Markl Frank Ramsak Robert Fenk Klaus Elhardt Rudolf Bayer Processing Star Queries on Hierarchically-Clustered Fact Tables. 2002 conf/vldb/2002 VLDB db/conf/vldb/vldb2002.html#KarayannidisTSPMRFEB02 http://www.vldb.org/conf/2002/S21P01.pdf 730-741