Cai-Li Zhou, Guo-Chun Zhang
      A fuzzy metric on the space of fuzzy sets
      International Journal of Mathematical Analysis, Vol. 9, 2015, no. 5, 237-247
      http://dx.doi.org/10.12988/ijma.2015.412408

Copyright © 2015 Cai-Li Zhou and Guo-Chun Zhang. This article is distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.