Nwokoro, O., and S. G. Uwa. “Production of Xylanase from Aspergillus Sydowii Isolated from Irvingia Gabonensis (African Mango) Fruit”. Journal of Biological Research and Biotechnology, vol. 13, no. 1, June 2016, pp. 889 – 896, https://doi.org/10.4314/br.v13i1.144796.