Thomas Zimmermann Nachiappan Nagappan Harald Gall Emanuel Giger Brendan Murphy Cross-project defect prediction: a large scale experiment on data vs. domain vs. process. 91-100 2009 ESEC/SIGSOFT FSE http://doi.acm.org/10.1145/1595696.1595713 conf/sigsoft/2009 db/conf/sigsoft/fse2009.html#ZimmermannNGGM09