AGOP AGOP 2015 : proceedings of the 8th International Summer School on Aggregation Operators (AGOP 2015), Katowice, Poland, 7. - 10. 7. 2015 / ed. Michał Baczyński, Bernard De Baets, Radko Mesiar. -- Katowice : University of Silesia, 2015. -- 244 s. -- ISBN : 978-83-8012-519-3. Baczyński, Michał. De Baets, Bernard. Mesiar, Radko, 1951-