Shehu, A. T., L. I. Nwankwo, and K. A. Salako. 2017. “The Source Parameter Imaging (SPI) Method for Estimation of Depth to Buried Magnetic Sources from Gridded Digital Data of the Sokoto Basin, Nigeria: Implications in Exploration Geophysics”. Zimbabwe Journal of Science and Technology 12 (1):66-72. https://journals.nust.ac.zw/index.php/zjst/article/view/109.