Mechay, Abderrahmen, et al. “Effect of Spark Plasma Sintering Process on the Microstructure and Mechanical Properties of Nano Crystalline Hydroxyapatite Ceramics Prepared by Hydrolysis in Polyol Medium”. International Journal of Advanced Chemistry, vol. 2, no. 2, June 2014, pp. 80-84, https://doi.org/10.14419/ijac.v2i2.2393.