@article{oai:tsukuba.repo.nii.ac.jp:00033367,
 author = {平山, 朝治 and HIRAYAMA, Asaji},
 journal = {筑波大学経済学論集, The University of Tsukuba economic review},
 month = {Mar},
 pages = {1--54},
 title = {互恵性と交換の進化},
 volume = {67},
 year = {2015},
 yomi = {ヒラヤマ, アサジ}
}