@article{oai:aichiu.repo.nii.ac.jp:00010987,
 author = {神頭, 広好 and KOZU, Hiroyoshi},
 issue = {115},
 journal = {経営総合科学, Journal of managerial research},
 month = {Sep},
 pages = {51--60},
 title = {四色問題の理論的解決},
 year = {2021}
}