Arja’i, Mulat, and Mohammad Farhan Qudratullah. “Analisis Portofolio Optimal Saham Syariah Menggunakan Multi Index Models (Periode: 04 Januari 2010 – 1 Juli 2013)”. Jurnal Fourier 2, no. 2 (October 31, 2013): 105–111. Accessed March 25, 2026. https://fourier.or.id/index.php/FOURIER/article/view/23.