SOFSEM 2010: Theory and Practice of Computer Science 36th Conference on Current Trends in Theory and Practice of Computer Science, Ε pindlerΕ-v MlΓ½n, Czech Republic, January 23-29, 2010. Proceedings - Leeuwen, J. Van 1850-1924 ((Jan)) (Springer-Verlag Berlin Heidelberg, 2010)