Egbe, N. E. ., L. . Ihediwa, M. S. . Abdulsalami, and A. . Adebayo. “Citric Acid Production from Agricultural Wastes Using Aspergillus Niger Isolated from Some Locations Within Kaduna Metropolis, Nigeria”. Journal of Applied Sciences and Environmental Management, vol. 26, no. 9, Sept. 2022, pp. 1607-14, doi:10.4314/jasem.v26i9.22.