Henning Fernau Wilhelm-Schickard-Institut fuer Informatik, Phone: +49-7071-29-77565 Universitaet Tuebingen, Secr.: +49-7071-29-78962 Sand 13, D-72076 Tuebingen FAX: +49-7071-29-5061 Germany Room: 007 WWW: http://www-fs.informatik.uni-tuebingen.de/~fernau privat: Weissdornweg 14/239 Phone: +49-7071-67052 D-72076 Tuebingen University of Newcastle School of Electrical Engineering and Computer Science University Drive Callaghan, NSW 2308, Australia fernau@cs.newcastle.edu.au Phone: +61 2 4921 6076 Fax: +61 2 4921 6929 privat: Unit 2, 122 Morgan Street Merewether, NSW 2291, Australia Phone: +61 2 4963 5423