NAGARAJOO, K. Analysis of the Earth Movement over the Equatorial Region by using the Ionosonde Observation Data. International Journal of Integrated Engineering, [S. l.], v. 1, n. 3, 2009. Disponível em: https://penerbit.uthm.edu.my/ojs/index.php/ijie/article/view/121.. Acesso em: 4 may. 2024.