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) Y. Nambu,The Use of the Proper Time in Quantum Electrodynamics I,Progress of Theoretical Physics,0033-068X,Oxford University Press (OUP),1950-02-01,5,1,82-94,https://cir.nii.ac.jp/crid/1361699993701063296,https://doi.org/10.1143/ptp/5.1.82