References of Nine palace map analysis method

1. Su Yong electric school, I ching, Peking University publishing house, 1989, p. 85. 2. Zhu, the original meaning of Zhouyi, Peking University Publishing House, 1992, p.147,207. 3. Lin, on Zheng Xuan's philosophy of easy number, Confucius Studies, 2003.3. 4. Kang Xiaohu, On the Relationship between Nine palace map and Ancient Computing, Journal of Yan 'an Education College, 200 1.4.