M. Manoraj, and M. N. M. Ansari. “Effects of Injection Moulding Process Parameters on Impact Strength of Polypropylene-Hydroxyapatite Biocomposite”. Journal of Mechanical Engineering and Sciences, vol. 11, no. 2, June 2017, pp. 2581-9, doi:10.15282/jmes.11.2.2017.2.0236.