Mahadevan Subramaniam Harvey P. Siy Consistently Incorporating Changes to Evolve Transition-based Systems. 17-26 2007 conf/csmr/2007 CSMR http://doi.ieeecomputersociety.org/10.1109/CSMR.2007.20 db/conf/csmr/csmr2007.html#SubramaniamS07