Variability of Sporadic-e (es) layer at two equatorial stations: Fortaleza (3os, 38ow) and Ilorin (8.5on, 4.5oe). Journal of Science and Technology, [S. l.], v. 34, n. 3, 2016. DOI: 10.4314/just.v34i3.25. Disponível em: https://journal.knust.edu.gh/index.php/just/article/view/25. Acesso em: 11 jun. 2026.