SOFSEM 2006: Theory and practice of Computer science : 32nd conference on Current Trends on Theory and Practice of Computer Science, Měřín, Czech Republik, January 2006, Proceedings vol. II - Wiedermann, Jiří; Tel, Gerard; Pokorný, Jaroslav; Bieliková, Mária, 1966-; Štuller, Július (Institute of Computer Science AS CR, 2006)