"NEQUICK MODEL PREDICTIONS AND THE OBSERVED TOTAL ELECTRON CONTENT (TEC) OVER NIGERIA" (2016) FULafia Journal of Science and Technology, 2(1), ص 106–110. موجود في: https://lafiascijournals.org.ng/index.php/fjst/article/view/39 (تاريخ الوصول: 17 مايو 2026).