In-vitro Anti-diabetic and Antioxidant Efficacy of Methanolic Extract of Encephalartos ferox leaves, Ojo, Michael Chukwuka, Osunsanmi Foluso Oluwagbemi, Zaharare Godfrey Elijah, Mosa Rebamang Anthony, Cele Nkosinathi David, Oboh Michael Osawemi, and Opoku Andy Rowland , Pharmacognosy Journal, May 2019, Volume 11, Issue 3, p.455-460, (2019)