Arindam Chakrabarti Krishnendu Chatterjee Thomas A. Henzinger Orna Kupferman Rupak Majumdar Verifying Quantitative Properties Using Bound Functions. 50-64 2005 conf/charme/2005 CHARME http://dx.doi.org/10.1007/11560548_7 db/conf/charme/charme2005.html#ChakrabartiCHKM05