SOFSEM 2013: Theory and Practice of Computer Science 39th International Conference on Current Trends in Theory and Practice of Computer Science, Špindlerův Mlýn, Czech Republic, January 26-31, 2013. Proceedings - Emde Boas, Peter van; Groen, Frans C. A.; Italiano, Giuseppe F.; Nawrocki, Jerzy; Sack, Harald (Springer Berlin Heidelberg : Imprint: Springer, 2013)