Yunita, Rahma, Erzalina Ayu Satya Megananda, Idris Idris, and Fuad Mas’ud. 2025. “Markowitz and Single Index Models for Optimal Portfolio Formation: Evidence from SRI-KEHATI Index”. Entrepreneurship and Innovation Review 3 (2): 279-96. https://doi.org/10.63208/210113-642.