conference proceedings. fuzzy logic. aggregation functionsJoint Joint Proceedings of the 19th World Congress of the International Fuzzy Systems Association (IFSA), the 12th Conference of the European Society for Fuzzy Logic and Technology (EUSFLAT), and the 11th International Summer School on Aggregation Operators (AGOP). -- 1. vyd. -- Dordrecht : Atlantis Press, 2021. -- 694 s. -- (Atlantis Studies in Uncertainty Modelling, vol. 3). -- ISBN : 978-94-6239-423-0. -- ISSN : 2589-6644. Mesiar, Radko, 1951-. Reformat, Marek. Štěpnička, Martin. Hurtík, Peter