Nick Russell Wil M. P. van der Aalst Arthur H. M. ter Hofstede Petia Wohed On the suitability of UML 2.0 activity diagrams for business process modelling. 95-104 2006 conf/apccm/2006 APCCM http://doi.acm.org/10.1145/1151855.1151866 db/conf/apccm/apccm2006.html#RussellAHW06