KOTZÉ, P. B. Geomagnetic secular variation changes in Southern Africa during the SWARM period 2013 - 2018. Annals of Geophysics, [S. l.], v. 63, n. 2, p. PA212, 2020. DOI: 10.4401/ag-8126. Disponível em: https://www.annalsofgeophysics.eu/index.php/annals/article/view/8126. Acesso em: 28 apr. 2024.