Toibah, A.R. et al. 2019. Effect of pH condition during hydrothermal synthesis on the properties of hydroxyapatite from eggshell waste. Journal of Mechanical Engineering and Sciences. 13, 2 (Jun. 2019), 4958–4969. DOI:https://doi.org/10.15282/jmes.13.2.2019.14.0411.