WAN, EZZRA, and NOOR HAKIM RAFAI. “The Effect of Binder on Hydroxyapatite(HAP) Properties and Surface Roughness When Machining”. Research Progress in Mechanical and Manufacturing Engineering, vol. 6, no. 1, Sept. 2025, pp. 182-90, https://publisher.uthm.edu.my/periodicals/index.php/rpmme/article/view/18787.