Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Mori Daisuke,Analyzing Relations of Necessity in Survey Research: Incorporating Notions of Fuzzy-Set Qualitative Comparative Analysis and Bootstrap,COMPASSS Working Paper,,,2021,97,,,https://cir.nii.ac.jp/crid/1010294643623707264,