Enrico Franconi Anand Kamble The GMD Data Model for Multidimensional Information: A Brief Introduction. 55-65 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2737&spage=55 2003 conf/dawak/2003 DaWaK db/conf/dawak/dawak2003.html#FranconiK03