Tomasa Calvo Radko Mesiar Generalized medians. 59-64 2001 124 Fuzzy Sets and Systems 1 http://www.sciencedirect.com/science/article/B6V05-43XG0C1-6/2/04579632748a7de6f2b8188e2660aea6 db/journals/fss/fss124.html#CalvoM01