Nguyen, Anh, and Nguyen Bang. “Discount Rate Method in Yi Jing”. VNUHCM Journal of Economics, Business and Law 5, no. 4 (August 5, 2021): 1772-1779. Accessed May 25, 2026. https://ebl.vnuhcmjournal.com.vn/index.php/ebl/article/view/703.