Shehab, Allia A., et al. “Modeling of the Effect of Grain Size on Final Stage of Sintering Al2O3”. Ibn AL-Haitham Journal For Pure and Applied Sciences, vol. 26, no. 1, Apr. 2017, pp. 173-8, https://jih.uobaghdad.edu.iq/index.php/j/article/view/521.