Akpabio Ekaete Ibanga, et al. “Evaluating Hydrocolloids of Sida Acuta As Sustained Release Matrix for Ibuprofen Tablet”. Global Journal of Medical Research, vol. 20, no. B4, Mar. 2020, pp. 15-21, https://medicalresearchjournal.org/index.php/GJMR/article/view/2064.