@article{oai:waseda.repo.nii.ac.jp:00009160, author = {久保田, 隆 and Kubota, Takashi}, issue = {4}, journal = {早稻田法學}, month = {Jun}, pages = {149--158}, title = {[講演]Considering some types of money : Japanese bill payment services}, volume = {84}, year = {2009} }