SOFSEM 2016: Theory and Practice of Computer Science 42nd International Conference on Current Trends in Theory and Practice of Computer Science, Harrachov, Czech Republic, January 23-28, 2016, Proceedings - Freivalds, Rūsiņš Mārtiņš; Engels, Gregor; Catania, Barbara (Springer Berlin Heidelberg : Imprint: Springer, 2016)