@article{oai:nagasaki-u.repo.nii.ac.jp:00006320,
 author = {吉田, 誠一郎},
 journal = {長崎大学学芸学部自然科学研究報告, Science reports of the Faculty of Arts and Literature, Nagasaki University},
 month = {Jan},
 note = {長崎大学学芸学部自然科学研究報告. vol.9, p.5-11; 1959},
 pages = {5--11},
 title = {凸凾数について},
 volume = {9},
 year = {1959}
}