Nagendra Bhargava Bharatula Stijn Ossevoort Mathias Stäger Gerhard Tröster 225-237 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3001&spage=225 2004 conf/pervasive/2004 Pervasive db/conf/pervasive/pervasive2004.html#BharatulaOST04