@techreport{weko_189864_1, author = "佐々木,隆幸 and 長瀬,智行", title = "直交多項式でつくる二重電子透かし", year = "2018", institution = "弘前大学大学院理工学研究科, 弘前大学大学院理工学研究科", number = "5", month = "jun" }