Albert Reyna, R.F. (2009) “The Concept of Language in the ‘Epistles of the Brethren of Purity’”, Anaquel de Estudios Árabes, 20, pp. 5–17. Available at: https://revistas.ucm.es/index.php/ANQE/article/view/ANQE0909110005A (Accessed: 21 July 2026).