Bui Van Khoan, Nguyen Thanh Phu, Le Thu Quy, and Pham Dang Loc. “Study on Component and Structure of Al2O3 - TiO2 Powder Made by Domestic Materials for Applying to Produce Plasma Spray Material”. UTEHY Journal of Applied Science and Technology, Vol. 12, Jan. 2017, pp. 15-21, http://jst.utehy.edu.vn/index.php/jst/article/view/230.