Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Satoh Kenichi,Soft Clustering Based on Non-negative Matrix Factorization for Longitudinal Data,Ouyou toukeigaku,0285-0370,Japanese Society of Applied Statistics,2022,51,1-2,1-18,https://cir.nii.ac.jp/crid/1390294740098247552,https://doi.org/10.5023/jappstat.51.1