Håkan L. S. Younes Marta Z. Kwiatkowska Gethin Norman David Parker Numerical vs. Statistical Probabilistic Model Checking: An Empirical Study. 46-60 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2988&spage=46 2004 conf/tacas/2004 TACAS db/conf/tacas/tacas2004.html#YounesKNP04