Pascal van Eck Jaap Gordijn Roel Wieringa Advanced Information Systems Engineering, 21st International Conference, CAiSE 2009, Amsterdam, The Netherlands, June 8-12, 2009. Proceedings 5565 2009 http://dx.doi.org/10.1007/978-3-642-02144-2 978-3-642-02143-5 CAiSE Lecture Notes in Computer Science Springer db/conf/caise/caise2009.html