Saputra, M. P. A., Hidayana, R. A. and Laksito, G. S. (2025) “Investment Portfolio Optimization using Mean-Semi Standard Deviation Model (Case Study: BBNI, BBCA, BMRI, TLKM, and ANTM)”, Operations Research: International Conference Series, 5(4), pp. 146–154. doi: 10.47194/orics.v5i4.353.