- Mieczyslaw A. Klopotek, Jacek Koronacki, Malgorzata Marciniak, Agnieszka Mykowiecka, Slawomir T. Wierzchon, editors, Language Processing and Intelligent Information Systems - 20th International Conference, IIS 2013, Warsaw, Poland, June 17-18, 2013. Proceedings. Volume 7912 of Lecture Notes in Computer Science, Springer, 2013.