Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Li Jen Chen and Jun Ohya and Shunichi Yonemura,"A method for creative communication using black-circled prompters ""●"": analysis of a method that allows users' freehand writing",電子情報通信学会技術研究報告 = IEICE technical report : 信学技報,09135685,東京 : 電子情報通信学会,2008-03,107,553,61-66,https://cir.nii.ac.jp/crid/1520853832691296128,