József Dombi. Modalities Based on Double Negation. In Radomír Halas, Marek Gagolewski, Radko Mesiar, editors, New Trends in Aggregation Theory, International Summer School on Aggregation Functions, AGOP 2019, Olomouc, Czech Republic, July 1-4, 2019. Volume 981 of Advances in Intelligent Systems and Computing, pages 327-338, Springer, 2019. [doi]