Nikolaj S. Bjørner, Irina B. Virbitskaite, Andrei Voronkov: Perspectives of System Informatics - 12th International Andrei P. Ershov Informatics Conference, PSI 2019, Novosibirsk, Russia, July 2-5, 2019, Revised Selected Papers. Lecture Notes in Computer Science 11964, Springer 2019, ISBN 978-3-030-37486-0