Hung Son Nguyen, Quang-Thuy Ha, Tianrui Li, Malgorzata Przybyla-Kasperek: Rough Sets - International Joint Conference, IJCRS 2018, Quy Nhon, Vietnam, August 20-24, 2018, Proceedings. Lecture Notes in Computer Science 11103, Springer 2018, ISBN 978-3-319-99367-6