Transactions on Computational Collective Intelligence XXXIV - Nguyen, Ngoc Thanh; Nguyen, Ngoc Thanh; Kowalczyk, Ryszard; Kowalczyk, Ryszard; Mercik, Jacek; Mercik, Jacek; Motylska-Kuźma, Anna; Motylska-Kuźma, Anna (Springer Berlin Heidelberg : Imprint: Springer, 2019)