AI-MAHDI, H.A.; MOKHEBER, A.F. A study of Geomagnetic Field and It’s secular variation at the Location Brazilian Anomaly (25°S, 45°W). Ibn AL-Haitham Journal For Pure and Applied Sciences, Baghdad, Iraq., v. 21, n. 1, p. 27–34, 2017. Disponível em: https://jih.uobaghdad.edu.iq/index.php/j/article/view/1370. Acesso em: 3 apr. 2025.