E. Okeke, H. Eneobong, A. Uzuegbunam, A. Ozioko, and H. Kuhnlein, “Igbo Traditional Food System: Documentation, Uses and Research Needs”, Pak. J. Nutr., vol. 7, no. 2, pp. 365–376, Feb. 2008, doi: 10.3923/pjn.2008.365.376.