T. Green. Proceedings of the fifth conference of the British Computer Society, Human-Computer Interaction Specialist Group on People and computers V, page 443--460. New York, NY, USA, Cambridge University Press, (1989)
F. Wolff, and U. Frank. Proceedings of the 13th European Conference on Information Systems, Information Systems in a Rapidly Changing Economy, ECIS 2005, Regensburg, Germany, May 26-28, 2005, (2005)
J. Krogstie, and H. Jorgensen. Conceptual Modeling - ER 2002, Workshops of the 21st International Conference on Conceptual Modeling, Tampere, Finland, LNCS 2784, page 351-363. Springer Verlag Berlin Heidelberg, (2003)
D. Dean, R. Orwig, J. Lee, and D. Vogel. Proceedings of the Twenty-Seventh Annual Hawaii International Conference on System Sciences, page 214-223. (1994)
D. Moody. Proceedings of Advances in Databases and Information Systems, 8th East European Conference, ADBIS 2004, Budapest, Hungary, September 22-25, page 129-143. Springer, (2004)
R. Schuette, and T. Rotthowe. ER '98: Proceedings of the 17th International Conference on Conceptual Modeling, page 240--254. London, UK, Springer-Verlag, (1998)