Dang , M. P., H. G. Le, S. Đang Le, G. N. Ho, H. Đức Truong, and M. T. To. “Design Development and Manufacture of a 4-Axis Laser Engraving Cnc Machine to Engrave Wooden Mica, Watermelon and Cylindrical Component Surfaces”. Journal of Technical Education Science, vol. 16, no. 5, Oct. 2021, pp. 27-36, doi:10.54644/jte.66.2021.1063.