Frank Ciesinski Marcus Größer On Probabilistic Computation Tree Logic. 147-188 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2925&spage=147 2004 conf/voss/2004 Validation of Stochastic Systems db/conf/voss/voss2004.html#CiesinskiG04