Gaetano Borriello Waylon Brunette Matthew Hall Carl Hartung Cameron Tangney Reminding About Tagged Objects Using Passive RFIDs. 36-53 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3205&spage=36 2004 conf/huc/2004 Ubicomp db/conf/huc/ubicomp2004.html#BorrielloBHHT04