Rui Abreu Wolfgang Mayer Markus Stumptner Arjan J. C. van Gemund Refining spectrum-based fault localization rankings. 409-414 2009 SAC http://doi.acm.org/10.1145/1529282.1529374 conf/sac/2009 db/conf/sac/sac2009.html#AbreuMSG09