Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) D.M. Endres and J.E. Schindelin,A new metric for probability distributions,IEEE Transactions on Information Theory,0018-9448,Institute of Electrical and Electronics Engineers (IEEE),2003-07,49,7,1858-1860,https://cir.nii.ac.jp/crid/1360011145803732608,https://doi.org/10.1109/tit.2003.813506