References
- Gwansang-gam, The 1723 SeongbyeonDeungrok (1723).
- Gwansang-gam, The 1752 Calendar (大淸乾隆十七年歲次壬申內用三書) (1752).
- Hankuk Minjok Munwha Daebaek'gua Sajeon 18 (Hankuk Jeongsin Munwha Yeon'guwon, Seoul, 1991), 17-22.
- Rufus WC, Astronomy in Korea, The Transactions of the Korea Branch of the Royal Asiatic Society, XXVI, 1-53 (1936).
- Seungjeong-won Ilgi, National Institute of Korean Histroy, 38, 816 (1730).
- Seungjeong-won Ilgi, National Institute of Korean Histroy, 42, 297 (1732).
- YeongjoSillok, 31, 9ab (1732).