Ismail, Muhammad Ikmal, and Mustaffa Ibrahim. “Analysis on Lighweighting Approach Topology Optimization Design for Additive Manufacturing (DfAM)”. Research Progress in Mechanical and Manufacturing Engineering, vol. 2, no. 2, Jan. 2022, pp. 860-8, https://publisher.uthm.edu.my/periodicals/index.php/rpmme/article/view/4790.