Mark Kattenbelt Marta Z. Kwiatkowska Gethin Norman David Parker Abstraction Refinement for Probabilistic Software. 182-197 2009 VMCAI http://dx.doi.org/10.1007/978-3-540-93900-9_17 conf/vmcai/2009 db/conf/vmcai/vmcai2009.html#KattenbeltKNP09