Habibie, S. ., Y. . Tristiyanti, D. Gustiono, M. E. . Harahap, S. Y. . Chalid, and D. . Effendi. “Production and Characterization of Scaffold Made of Hydroxyapatite and Pectin of Green Cincau Leaf (Premna Oblongifolia Merr)”. Journal of Engineering and Scientific Research, vol. 1, no. 1, Dec. 2020, pp. 12-16, doi:10.23960/jesr.v1i1.4.