Tyopine, A., S. Obalum, C. Igwe, and C. Okoye. “Spatial Distribution and Relative Enrichment of Some Upper-Group Trace Elements in Rhizosphere of Highly Anthropized and Rapidly Developing Tropical Environment”. EQA - International Journal of Environmental Quality, vol. 49, no. 1, Jan. 2022, pp. 19-33, doi:10.6092/issn.2281-4485/14554.