magdy, Shrouk, et al. “Formulation and In-Vitro Characterization of Metformin Hydrochloride-Loaded Liposomes”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 56, no. 1, Feb. 2021, pp. 150-64, https://www.gssrr.org/JournalOfBasicAndApplied/article/view/12330.