Sven Heiberg Uuno Puus Priit Salumaa Asko Seeba Pair-Programming Effect on Developers Productivity. 215-224 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2675&spage=215 2003 conf/xpu/2003 XP db/conf/xpu/xp2003.html#HeibergPSS03