Mumuni A Momoh, Calister E Ugwu, Tenderwealth Clement Jackson, and Ngumezi C Udodiri. “Sustained Release Formulation of Metformin-Solid Dispersion Based on Gelucire 50/13- PEG4000: An in Vitro Study”. International Journal of Drug Delivery, vol. 9, no. 3, Sept. 2017, pp. 52-70, https://ijdd.arjournals.org/index.php/ijdd/article/view/310.