Nicolas Bettenburg Rahul Premraj Thomas Zimmermann Sunghun Kim Duplicate bug reports considered harmful ... really? 337-345 2008 ICSM http://dx.doi.org/10.1109/ICSM.2008.4658082 conf/icsm/2008 db/conf/icsm/icsm2008.html#BettenburgPZK08