Kamal, Achmad F., et al. “Biocompatibility of Various Hydoxyapatite Scaffolds Evaluated by Proliferation of rat’s Bone Marrow Mesenchymal Stem Cells: an <em>in vitro< em> Study”. Medical Journal of Indonesia, vol. 22, no. 4, Dec. 2013, pp. 202-8, doi:10.13181/mji.v22i4.600.