Mat Yahya, Nafrizuan, Ahmad Razlan Yusoff, Azlyna Senawi, and M. Osman Tokhi. “Dual Level Searching Approach for Solving Multi Objective Optimisation Problems Using Hybrid Particle Swarm Optimisation and Bats Echolocation-Inspired Algorithms”. Mekatronika 1, no. 1 (January 31, 2019): 45-57. Accessed March 5, 2021. https://journal.ump.edu.my/mekatronika/article/view/155.