Petia Wohed Wil M. P. van der Aalst Marlon Dumas Arthur H. M. ter Hofstede Nick Russell Pattern-Based Analysis of the Control-Flow Perspective of UML Activity Diagrams. 63-78 2005 conf/er/2005 ER http://dx.doi.org/10.1007/11568322_5 db/conf/er/er2005.html#WohedADHR05