Iulian Ober Susanne Graf Ileana Ober Validation of UML Models via a Mapping to Communicating Extended Timed Automata. 127-145 http://dx.doi.org/10.1007/978-3-540-24732-6_9 2004 conf/spin/2004 SPIN db/conf/spin/spin2004.html#OberGO04