Robert Fenk Akihiko Kawakami Volker Markl Rudolf Bayer Shunji Osaki Bulk Loading a Data Warehouse Built Upon a UB-Tree. 179-187 http://www.computer.org/proceedings/ideas/0789/07890179abs.htm 2000 conf/ideas/2000 IDEAS db/conf/ideas/ideas2000.html#FenkKMBO00