@techreport{weko_36252_1, author = "川村信一 and 神竹孝至 and 水谷,博之", title = "ICカードを用いた取引証明法", year = "1986", institution = "(株)東芝総合研究所, (株)東芝総合研究所, (株)東芝総合研究所", number = "51(1986-DPS-030)", month = "jul" }