Isheanesu, Dzambi, and Mangoyi Rumbidzai. 2020. “The Effects of Psidium Guajava Leaf Extract on the Production of Cellulases and Glucose Oxidases by Aspergillus Niger”. GSC Advanced Research and Reviews 5 (2):118-22. https://doi.org/10.30574/gscarr.2020.5.2.0109.