@article{oai:dokkyo.repo.nii.ac.jp:00002843,
 author = {湯川, 益英 and Yukawa, Masuhide},
 issue = {111},
 journal = {獨協経済, Dokkyo University Studies of Economics},
 month = {Nov},
 pages = {13--27},
 title = {商品交換における自由意志の概念(2)},
 year = {2021}
}