sandyakala, disca (2020) “The Effect of Poly (Vynil Pyrrolidine) (PVP) Added in Variation of Ca2+ and PO43- Concentration in Microbial Cellulose-Hydroxyapatite Composite As Scaffold For Bone Healing”, Journal of Stem Cell Research and Tissue Engineering, 3(2), pp. 76–98. doi: 10.20473/jscrte.v3i2.20358.