Monmaturapoj, N., and C. Yatongchai. “Effect of Sintering on Microstructure and Properties of Hydroxyapatite Produced by Different Synthesizing Methods”. Journal of Metals, Materials and Minerals, vol. 20, no. 2, Apr. 2017, https://jmmm.material.chula.ac.th/index.php/jmmm/article/view/210.