Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI)
Toyoda Hideki and Ikehara Kazuya,"An improved method using k-means to determine the optimal number of clusters, considering the relations between several variables",The Japanese journal of psychology,00215236,The Japanese Psychological Association,2011,82,1,32-40,https://cir.nii.ac.jp/crid/1390001205078546048,https://doi.org/10.4992/jjpsy.82.32