Abdulkareem, S., A. A. Khan, and M. Konneh. “Analysis of Microlayer Defects of a Functionally Graded Titanium Alloy by Electrical Discharge Machining”. Engineering and Applied Science Research, vol. 45, no. 1, Feb. 2018, pp. 17-22, https://ph01.tci-thaijo.org/index.php/easr/article/view/75960.