Yuliani, P., Hardiansyah, H., & Albart, N. (2025). Portfolio Efficiency Analysis of UNVR and SMGR Using the Efficient Frontier Approach: A Comparative Study in the Framework of Indonesia’s Green Economy Commitment. Indonesian Interdisciplinary Journal of Sharia Economics (IIJSE), 8(3), 12202-12211. https://doi.org/10.31538/iijse.v8i3.8067