Grzegorz Rozenberg
Leiden Institute of Advanced Computer Science
Leiden University
Niels Bohrweg 1
2333 CA Leiden
The Netherlands

Phone: +31 71 5277067 (direct), +31 71 - 5 277061 (secretary)
Fax: +31 71 - 5 276985
E-mail: rozenber (AT) liacs.nl
Web: http://www.liacs.nl/~rozenber/