1. D. Marbawati and S.R. Umniyati, Tropical Medicine Journal, 3(2), 95–102 (2013).
2. B. Yong, F. Kristiani and R. Irawan, CR Journal, 2(1), 39–54 (2016).
3. A global optimization problem in portfolio selection
4. H. Markowitz, The Journal of Finance, 7(1), 77–91 (1952).
5. Badan Pusat Statistik Kota Bandung. Bandung (2014).