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) Ichinose Takashi and Murayama Taro and 一瀬 孝,The zero-mass limit problem for a relativistic spinless particle in an electromagnetic field,Proceedings of the Japan Academy Series A: Mathematical Sciences,0386-2194,日本学士院 = Japan Academy,2014-01-01,90,3,60-65,https://cir.nii.ac.jp/crid/1390014491999402752,https://doi.org/10.24517/00010500