SOFSEM 2012: Theory and Practice of Computer Science 38th Conference on Current Trends in Theory and Practice of Computer Science, Špindlerův Mlýn, Czech Republic, January 21-27, 2012. Proceedings - Bieliková, Mária; Friedrich, Gerhard; Gottlob, Georg; Katzenbeisser, Stefan; Turán, György (Springer Berlin Heidelberg : Imprint: Springer, 2012)