Thi Tuan Anh, Tran. “Applying Approximate Entropy to Compare the Randomness of Data Series in Aseans’stock Markets”. VNUHCM Journal of Economics, Business and Law 2, no. 4 (March 28, 2019): 5-13. Accessed March 24, 2026. http://stdjelm.scienceandtechnology.com.vn/index.php/stdjelm/article/view/525.