Please replace "(AT)" with "@" in the e-mail address.

Wojciech Penczek
Institute of Computer Science, PAS
Ordona 21
01-237 Warsaw
Poland

and

University of Podlasie
Institute of Computer Science
Sienkiewicza 51
08-110 Siedlce
Poland

Phone: +48 22 8362841
Fax: +48 25 6442045
E-mail: penczek (AT) ipipan.waw.pl
Web: http://www.ipipan.waw.pl/~penczek/