Rodríguez-Arribas, Josefina; and L. Kremer, Richard. “Practical Astronomy in Fourteenth-Century Provence: Immanuel ben Jacob Bonfils of Tarascon and the Construction of Astrolabes (Study, Critical Edition, and Translation)”. Suhayl. International Journal for the History of the Exact and Natural Sciences in Islamic Civilisation, pp. 175-8, https://raco.cat/index.php/Suhayl/article/view/409670.