Onojake, Lawson, et al. “Ecological Risk of Polychlorinated Biphenyls in Soil from Selected Residential Dumpsites in Delta State, Nigeria”. FUDMA JOURNAL OF SCIENCES, vol. 10, no. 8, June 2026, pp. 386-91, https://doi.org/10.33003/fjs-2026-1008-5387.