Cheong, A. C. H. “To Review the Sintering Methods and the Effects towards Yttria-Stabilized Tetragonal Zirconia Polycrystal (Y-Tzp)”. International Journal of Advanced Science and Technology, Vol. 29, no. 1, Jan. 2020, pp. 111 -28, http://sersc.org/journals/index.php/IJAST/article/view/2984.