Tejesh H R and Jeelan Basha, “An Empirical investigation of the Markowitz and Sharpe’s Single index model in building optimum Portfolio ”, SIJSS, vol. 21, no. 1, pp. 1–8, Jul. 2023, Accessed: Apr. 04, 2026. [Online]. Available: https://journal.sijss.com/index.php/home/article/view/38