E. U. Ezeji, C. O. Anyanwu, and N. C. D. Ukwandu. “Evaluation of Heavy Metals and Physicochemical Parameters of Oil-Contaminated Soil and Water Samples from Bonny, South-South, Nigeria”. Archives of Current Research International, vol. 19, no. 2, Nov. 2019, pp. 1–11, doi:10.9734/acri/2019/v19i230152.