Physicochemical Properties Comparison of Hydroxyapatite After the Ball Milling ProcessWidi Widayat, Rifky Ismail, A. P. Bayuseno, Rahmat Doni Widodo and Agus PrasetyoE3S Web Conf., 674 (2025) 12003DOI: https://doi.org/10.1051/e3sconf/202567412003