Tibor Bakota Rudolf Ferenc Tibor Gyimóthy Claudio Riva Jianli Xu Towards Portable Metrics-based Models for Software Maintenance Problems. 483-486 2006 conf/icsm/2006 ICSM http://doi.ieeecomputersociety.org/10.1109/ICSM.2006.69 db/conf/icsm/icsm2006.html#BakotaFGRX06