Sulungu, Emmanuel D., and Christian B.S. Uiso. “Total Electron Content Prediction Model Using the Artificial Neural Networks over the Eastern Africa Region”. Tanzania Journal of Science 45, no. 3 (March 8, 2021): 502–517. Accessed July 25, 2024. http://tjs.udsm.ac.tz/index.php/tjs/article/view/218.