Luke, M. E. ., and L. O. . Odokuma. “Acute Toxicity of Crude Oil from NNPC and Artisanal Refineries in Niger Delta on Selected Aquatic Biota”. GSC Biological and Pharmaceutical Sciences, vol. 15, no. 3, June 2021, pp. 016-24, doi:10.30574/gscbps.2021.15.3.0143.