@article{oai:kwansei.repo.nii.ac.jp:00026033,
 author = {東田, 啓作 and Higashida, Keisaku},
 issue = {1},
 journal = {経済学論究, The journal of economics of Kwansei Gakuin University},
 month = {Jun},
 pages = {131--163},
 title = {製品差別化、貿易、および特許の保護範囲に関する理論的考察},
 volume = {71},
 year = {2017}
}