Madu, J. M., A. I. Ogbonna, and C. I. C. Ogbonna. “Effects of Process Parameters on the Activities of Enzymes by Different Species of Aspergillus in Crude Polluted Soil Sites”. Biotechnology Journal International, Vol. 25, no. 3, May 2021, pp. 9-17, doi:10.9734/bji/2021/v25i330140.