SOFSEM 2013: Theory and Practice of Computer Science : 39th International Conference on Current Trends in Theory and Practice of Computer Science, .pindler.v Mlýn, Czech Republic, January 26-31, 2013, Proceedings - Peter Emde Boas, Frans C. A. Groen, Giuseppe F. Italiano, Jerzy Nawrocki, Harald Sack ((Lecture Notes in Computer Science))