Language and Automata Theory and Applications 13th International Conference, LATA 2019, St. Petersburg, Russia, March 26-29, 2019, Proceedings - Martín-Vide, Carlos; Martín-Vide, Carlos; Okhotin, Alexander; Okhotin, Alexander; Shapira, Dana; Shapira, Dana (Springer International Publishing : Imprint: Springer, 2019)