著者名,論文名,雑誌名,ISSN,出版者名,出版日付,巻,号,ページ,URL,URL(DOI) Yoshikazu Seki and Hiroaki Ikeda and Hidenori Sakai and Takeshi Nagami,Usability Evaluation of 4-Direction Keys for Ladder Menu Operation,,,Springer International Publishing,2016-01-01,,,,https://cir.nii.ac.jp/crid/1873398392974876032,https://doi.org/10.1007/978-3-319-39516-6_32