Shuai, C., Y. Nie, C. Gao, H. Lu, H. Hu, X. Wen, and S. Peng. “Poly (l-Lactide Acid) Improves Complete Nano-Hydroxyapatite Bone Scaffolds through the Microstructure Rearrangement”. Electronic Journal of Biotechnology, vol. 15, no. 6, Oct. 2012, https://www.ejbiotechnology.info/index.php/ejbiotechnology/article/view/v15n6-4.