1 |
Gyeongguk Daejeon (1469), The National Library of Korea. <經國大典> (1469), 국립중앙도서관.
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2 |
Sok Daejeon (1744), The National Library of Korea. <續大典> (1744), 국립중앙도서관.
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3 |
Jo Tae-gu, Juseo Gwan-gyeon (1718), Seoul National University Library. 趙泰耉, <籌書管見> (1718), 서울大學校 圖書館.
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4 |
Hong Sung Sa, Hong Young Hee, Kim Chang Il, Approximate Solutions of Equations in Chosun Mathematics, The Korean Journal for History of Mathematics 25(3) (2012), 1-14.(홍성사, 홍영희, 김창일, 方程式의 近似解, 한국수학사학회지 25(3) (2012), 1-14.)
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5 |
The Annals of the Joseon Dynasty. 朝鮮王朝實錄. http://sillok.history.go.kr
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