Kerstin Altmanninger Gabriele Kotsis Towards Accurate Conflict Detection in a VCS for Model Artifacts: A Comparison of Two Semantically Enhanced Approaches. 139-146 2009 APCCM http://crpit.com/confpapers/CRPITV96Altmanninger.pdf conf/apccm/2009 db/conf/apccm/apccm2009.html#AltmanningerK09