IZAH, Sylvester Chibueze, Lovet T. KIGIGHA, Ebinyo Rebecca ASEIBAI, Ifeoma Peace OKOWA, and Langley Ayibawanaimi ORUTUGU. 2016. “Advances in Preservatives and Condiments Used in Zobo (a Food-Drink) Production”. Biotechnological Research 2 (3), 104-19. http://br.biomedpress.org/index.php/br/article/view/721.