Preslav Nakov, Marcos Zampieri, Nikola Ljubesic, Jörg Tiedemann, Shervin Malmasi, Ahmed Ali: Proceedings of the Fourth Workshop on NLP for Similar Languages, Varieties and Dialects, VarDial 2017, Valencia, Spain, April 3, 2017. Association for Computational Linguistics 2017, ISBN 978-1-945626-43-2