Suksomrana, W., and R. Molloy. “Hydroxyapatite Prepared by Co-Precipitation with Calcium Carbonate: Effects of Digested Calcium Carbonate and Phosphate Sources”. Asian Health, Science and Technology Reports, vol. 25, no. 1, Feb. 2017, pp. 57-66, https://ph03.tci-thaijo.org/index.php/ahstr/article/view/1845.