Abdillah Khakim, Dwi Eko Waluyo. Optimal Portfolio Analysis of Cross-Sector Stocks on the Indonesia Stock Exchange (IDX). ICMEB [Internet]. 2025 Dec. 31 [cited 2026 Jan. 19];2(2):508-20. Available from: https://prosiding.arimbi.or.id/index.php/ICMEB/article/view/311