Zaheer, Kashif Bin, Mohd Ismail Bin Abd Aziz, Amber Nehan Kashif, and Syed Muhammad Murshid Raza. 2018. “Two Stage Portfolio Selection and Optimization Model With the Hybrid Particle Swarm Optimization”. MATEMATIKA 34 (1):125-41. https://doi.org/10.11113/matematika.v34.n1.1001.