Marta Z. Kwiatkowska Gethin Norman Jeremy Sproston Fuzhi Wang Symbolic Model Checking for Probabilistic Timed Automata. 293-308 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3253&spage=293 2004 conf/formats/2004 FORMATS/FTRTFT db/conf/formats/formats2004.html#KwiatkowskaNSW04