著者名,論文名,雑誌名,ISSN,出版者名,出版日付,巻,号,ページ,URL,URL(DOI) J. de Trefford and K. Lafferty,What does photoplethysmography measure?,Medical and Biological Engineering and Computing,0140-0118,Springer Science and Business Media LLC,1984-09,22,5,479-480,https://cir.nii.ac.jp/crid/1363670320307450240,https://doi.org/10.1007/bf02447713