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) H. E. D. Scovil and E. O. Schulz-DuBois,Three-Level Masers as Heat Engines,Physical Review Letters,0031-9007,American Physical Society (APS),1959-03-15,2,6,262-263,https://cir.nii.ac.jp/crid/1361699995024401280,https://doi.org/10.1103/physrevlett.2.262