Ambait, J.M.S., Cruz, J.K.A. and Somintac, A.S. 2013. Utilization of porcine bones to fabricate hydroxyapatite pellets and their application towards removal of Zn2+ and Cu2+ ions in aqueous solution. Proceedings of the Samahang Pisika ng Pilipinas, 31(1), SPP2013-5A-3. URL: https://proceedings.spp-online.org/article/view/SPP2013-5A-3.