M. Djebbar, N. Chaffai, F. Bouchal, and N. Aouf, “Effervescent floating tablets of metformin HCl developed by melt granulation. Part I: Effect of hydrophilic polymer on biopharmaceutical properties”, GSC Biol. Pharm. Sci., vol. 6, no. 2, pp. 052–067, Feb. 2019.