1. Binangkit, I. D., & Savitri, E. (2016). Analisis Perbandingan Kinerja Saham-saham Syariah dan Saham-saham Konvensional pada Portofolio Optimal dengan Pendekatan Single Index Model (Studi Kasus pada Bursa Efek Indonesia Tahun 2013–2015). Jurnal Tepak Manajemen Bisnis, 8(3).
2. Nurhayati, I., Endri, E., Suharti, T., Aminda, R. S., & Muniroh, L. (2021). The impact of COVID-19 on formation and evaluation of portfolio performance: A case of Indonesia. Investment Management and Financial Innovations, 18(3), 63–73.
3. Nurhayati, I., Endri, E., Aminda, R. S., & Muniroh, L. (2021). Impact of COVID-19 on performance evaluation large market capitalization stocks and open innovation. Journal of Open Innovation: Technology, Market, and Complexity, 7(1), 56.
4. Safitri, E., Nilawati, A., & Widyastuty, P. (2013). Perbedaan Kinerja Saham Pada Perusahaan Agriculture Sebelum dan Sesudah dan Pada Saat Krisis Ekonomi Global di Bursa Efek Indonesia. Jurnal Ilmiah STIE MDP, 3(1), 26–36.
5. Chakraborty, S. (2018). Construction of optimal portfolio using Sharpe’s single index model and Markowitz model. Journal of General Management Research, 86.