H. Zhu. Proceedings of Canadian Conference on Electrical and Computer Engineering 2003 (IEEE CCECE 2003), 2, Seite 687-690. Montreal, Canada, IEEE Computer Society, (Mai 2003)
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)