Ghazali, Puspa Liza, Riaman Riaman, and Ristifani Ulfatmi. “Calculation of Value-at-Risk Variance-Covariance With the Approach of Simple Cash Portfolio, Factor Models and Cash Flow”. Operations Research: International Conference Series 1, no. 1 (February 5, 2020): 19–24. Accessed January 14, 2026. https://www.iorajournal.org/index.php/Orics/article/view/20.