S. Dustdar, M. Vasko:
"An Analysis of Web Services Workflow Patterns in Collaxa";
Talk: European Conference, ECOWS 2004, Erfurt, Germany; 2004-09-01; in: "Web Services", Springer, Lncs 3250 (2004), ISBN: 3-540-23202-8; 1 - 14.
http://aleph.ub.tuwien.ac.at/F?base=tuw01&func=find-c&ccl_term=AC04968577