@article{oai:tsukuba.repo.nii.ac.jp:00015177,
 author = {Suzuki, Shinsuke and 秋山, 英三 and AKIYAMA, Eizo},
 issue = {1},
 journal = {Journal of theoretical biology},
 month = {Nov},
 pages = {93--100},
 title = {Three-person game facilitates indirect reciprocity under image scoring},
 volume = {249},
 year = {2007},
 yomi = {アキヤマ, エイゾウ}
}