Maharakkhaka, B., B. Suteerawattananon, and S. Ramasoot. “Is It Worth to Include Bitcoin in Your Investment Portfolio? Risk-adjusted Returns Portfolio Optimization”. International Journal of Development Administration Research, vol. 7, no. 1, June 2024, pp. 73-89, https://so02.tci-thaijo.org/index.php/ijdar/article/view/270550.