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) SCHELBERT HR,N-13 ammonia as an indicator of myocardial blood flow,Circulation,,,1981,63,,1259-1263,https://cir.nii.ac.jp/crid/1570291224299301760,