SHIMHANDA, S.; CILLIERS, P.J.; FRANCIS, S. Analysis of ionospheric Total Electron Content variability determined from Global Navigation Satellite System data. Namibian Journal for Research, Science and Technology, Windhoek, Namibia, v. 1, n. 1, p. 3–9, 2018. DOI: 10.54421/njrst.v1i1.4. Disponível em: https://journals.ncrst.na/index.php/njrst/article/view/4. Acesso em: 18 jul. 2026.