著者名,タイトル,雑誌名,ISSN,出版者名,出版日付,巻,号,ページ,URL,URL(DOI) Toyoshima,Risk analysis and countermeasure planning against cyber-attacks,Journal of Human Factors in Japan,,,2011,15,2,4,https://cir.nii.ac.jp/crid/1370287750679329409,