@article{oai:aichiu.repo.nii.ac.jp:00010725,
 author = {梅垣, 敦紀 and UMEGAKI, Atsuki and 梅垣, 由美子 and UMEGAKI, Yumiko},
 issue = {44},
 journal = {文明21, Civilization 21},
 month = {Mar},
 note = {40022254694},
 pages = {69--97},
 title = {数独の数学},
 year = {2020}
}