Susanne Saminger-Platz Radko Mesiar Didier Dubois Aggregation Operators and Commuting. 1032-1045 2007 15 IEEE T. Fuzzy Systems 6 http://dx.doi.org/10.1109/TFUZZ.2006.890687 db/journals/tfs/tfs15.html#Saminger-PlatzMD07