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) Martin A. Nowak and Karl Sigmund,Evolution of indirect reciprocity,Nature,0028-0836,Springer Science and Business Media LLC,2005-10,437,7063,1291-1298,https://cir.nii.ac.jp/crid/1361981469966545280,https://doi.org/10.1038/nature04131