Mikko Rönkkö Christian Frühwirth Stefan Biffl Integrating Value and Utility Concepts into a Value Decomposition Model for Value-Based Software Engineering. 362-374 2009 PROFES http://dx.doi.org/10.1007/978-3-642-02152-7_27 conf/profes/2009 db/conf/profes/profes2009.html#RonkkoFB09