Alexander Meduna, Full Professor of Computer Science at the Brno University of Technology, received his PhD from this university in 1988. He has taught mathematics and computer science at various European, Asian, and American universities, including the University of Missouri, where he spent a decade teaching advanced topics of the formal language theory and its applications in computer science. He is the author of the books entitled Automata and Languages (Springer, 2000), Elements of Compiler Design (Taylor and Francis, 2008), and Formal Languages and Computation: Models and Their Applications (CRC Press, 2014) . Along with his former PhD students, he is also the co-author of Grammars with Context Conditions and Their Applications (co-authored by M. Švec, Wiley, 2005), Scattered Context Grammars and Their Applications (co-authored by J. Techet, WIT Press, 2010), and Regulated Grammars and Automata (co-authored by P. Zemek, Springer, 2014).  He has published over ninety  papers closely related to the subject of this book. Ondřej Soukup received his PhD from the Brno University of Technology in 2017 under the supervision of Alexander Meduna.  He has published several studies on modern language models in such distinguished computer science journals as Fundamenta Informatica, International Journal of Foundations of Computer Science, and Theoretical Computer Science.