NWANKWO, C., and M. OGORO. “Geophysical Investigation of the Impact of Solid Waste Dump on Subsurface Soil and Groundwater in Eneka, Rivers State Nigeria”. GeoScience Engineering, vol. 66, no. 3, Sept. 2020, pp. 121–135, https://geoscience.cz/ojs/index.php/GSE/article/view/307.