Jiri Sgall Ales Pultr Petr Kolman Mathematical Foundations of Computer Science 2001, 26th International Symposium, MFCS 2001 Marianske Lazne, Czech Republic, August 27-31, 2001, Proceedings MFCS Lecture Notes in Computer Science 2136 Springer 2001 3-540-42496-2 db/conf/mfcs/mfcs2001.html