Craig Gelowitz Ian Sloman Luigi Benedicenti Raman Paranjape Real-Time Extreme Programming. 63-72 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2675&spage=63 2003 conf/xpu/2003 XP db/conf/xpu/xp2003.html#GelowitzSBP03