Dinh, T., H. Nguyen, H. Le, and H. Ho. “Preparation of Insulin Loaded Chitosan- TPP Nanoparticles by Ionic Gelation Method”. Science and Technology Development Journal, Vol. 18, no. 3, Aug. 2015, pp. 125-34, doi:https://doi.org/10.32508/stdj.v18i3.828.