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) Shimizu Toshihiro,On a new decoupling scheme for the retarded Green function and its application to the Heisenberg ferromagnet-2-,Journal of the Physical Society of Japan,00319015,Tokyo : Physical Society of Japan,1971-05,30,5,1292-1299,https://cir.nii.ac.jp/crid/1522825129706468224,