Lonnie D. Harvel Ling Liu Gregory D. Abowd Yu-Xi Lim Chris Scheibe Chris Chatham Context Cube: Flexible and Effective Manipulation of Sensed Context Data. 51-68 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3001&spage=51 2004 conf/pervasive/2004 Pervasive db/conf/pervasive/pervasive2004.html#HarvelLALSC04