Anh, C. T., D. H. Lien, N. T. Lan, and N. A. Viet. “Study of Hanoi and HoChiMinh Stock Exchange by Econophysics Methods”. Communications in Physics, vol. 24, no. 3S2, Sept. 2014, pp. 151–156, doi:10.15625/0868-3166/24/3S2/5011.