@article{oai:oit.repo.nii.ac.jp:00000301,
 author = {土出, 智也 and 真貝, 寿明 and DODE, Tomoya and SHINKAI, Hisaaki},
 issue = {1},
 journal = {大阪工業大学紀要, Memoirs of Osaka Institute of Technology},
 month = {Aug},
 pages = {1--18},
 title = {数独パズルの難易度判定 ―解法ロジックを用いた数値化の提案―},
 volume = {56},
 year = {2011},
 yomi = {ドデ, トモヤ and シンカイ, ヒサアキ}
}