Jing Han Zhanpeng Yang Xian Sun 0001 Guangluan Xu Chordal distance and non-Archimedean chordal distance between Atanassov's intuitionistic fuzzy set. 3889-3894 2017 33 J. Intell. Fuzzy Syst. 6 https://doi.org/10.3233/JIFS-17724 db/journals/jifs/jifs33.html#HanYSX17