Audu, Ibrahim Abubakar, et al. “Geospatial Assessment of Legal and Illegal Solid Waste Dumping Sites in Sokoto Metropolis, Nigeria”. African Journal of Environmental Sciences and Renewable Energy, vol. 21, no. 1, Nov. 2025, pp. 01-13, https://doi.org/10.62154/ajesre.2025.021.01011.