Ugwu, Daniel Onyedikachi, et al. “Soil Physicochemical, Biochemical and Microbial Properties at Varying Proximities to Ten-Year-Old Palm Oil-Mill Effluent Dumpsite in Derived Savannah”. AgroEnvironmental Sustainability, vol. 3, no. 4, Dec. 2025, pp. 328–343, https://doi.org/10.59983/s2025030403.