A. Pashalidis, und C. Mitchell. Proceedings of 8th Australasian Conference on Information Security and Privacy (ACISP 2003), Volume 2727 von Lecture Notes in Computer Science, Seite 249--264. Berlin Heidelberg, Springer-Verlag, (Juli 2003)
M. Nyanchama, und S. Osborn. Proceedings of the IFIP WG11.3 Working Conference on Database Security VII, Seite 37--56. Amsterdam, The Netherlands, The Netherlands, North-Holland Publishing Co., (1994)
W. Edwards. Proceedings of the 1996 ACM conference on Computer supported cooperative work - CSCW '96, Seite 11-20. New York, USA, ACM Press, (November 1996)