Jirí Fiala Václav Koubek Jan Kratochvíl Mathematical Foundations of Computer Science 2004, 29th International Symposium, MFCS 2004, Prague, Czech Republic, August 22-27, 2004, Proceedings MFCS Lecture Notes in Computer Science 3153 Springer 2004 3-540-22823-3 db/conf/mfcs/mfcs2004.html