Florian Gottschalk Wil M. P. van der Aalst Monique H. Jansen-Vullers Marcello La Rosa Configurable Workflow Models. 177-221 2008 17 Int. J. Cooperative Inf. Syst. 2 http://dx.doi.org/10.1142/S0218843008001798 db/journals/ijcis/ijcis17.html#GottschalkAJR08