Pandiangan, N., Sukono, S. and Hasbullah, E. S. (2021) “Quadratic Investment Portfolio Based on Value-at-risk with Risk-Free Assets: For Stocks of the Mining and Energy Sector”, International Journal of Energy Economics and Policy, 11(4), pp. 175–184. Available at: https://www.econjournals.com/index.php/ijeep/article/view/11165 (Accessed: 18 April 2024).