Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) 小林 龍彦 and 田中 薫,Problems of the Pierced Object in the Old Japanese Mathematics -Study of the Pierced Object by K. Sekj and Its Successions-,"Journal of History of Science, JAPAN",00227692,History of Science Society of Japan,1983,22,147,154-159,https://cir.nii.ac.jp/crid/1390289486949143552,https://doi.org/10.34336/jhsj.22.147_154