VEGI, A. R.; CHALLA, J.; M. B, S. Long Term Variations of Ionospheric Horizontal Drift and Anisotropy of E-region Irregularities at Waltair. American Scientific Research Journal for Engineering, Technology, and Sciences, [S. l.], v. 36, n. 1, p. 184–197, 2017. Disponível em: https://www.asrjetsjournal.org/index.php/American_Scientific_Journal/article/view/3384. Acesso em: 16 may. 2024.