SCHMIDL, P. S. Two Early Arabic Sources on the Magnetic Compass. Journal of Arabic and Islamic Studies, [S. l.], v. 1, p. 81–132, 2017. DOI: 10.5617/jais.4547. Disponível em: https://journals.uio.no/JAIS/article/view/4547. Acesso em: 20 jul. 2024.