>>555
実証研究ではこんなところ
https://www.jstage.jst.go.jp/article/jcrdajp/35/1/35_KJ00009505447/_pdf/-char/ja
https://core.ac.uk/download/pdf/230239753.pdf
https://dl.ndl.go.jp/view/download/digidepo_10500823_po_ART0010320677.pdf?contentNo=1&;alternativeNo=