Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) EBARA Takeshi,What Should We Learn from the “2:1” Ratio?:,The Japanese Journal of Ergonomics,05494974,Japan Ergonomics Society,2021-08-15,57,4,151-154,https://cir.nii.ac.jp/crid/1390570574766733312,https://doi.org/10.5100/jje.57.151