Islamischer Fundamentalismus / H. Lücke, 1993 (l'ouvrage indique que l'auteur est
de nationalité anglaise)
The Path of God's bondsmen from origin to return : a Sufi compendium / by Najm al-Dīn
Rāzī, known as Dāya ; translated from the Persian, with introduction and annotation
by Hamid Algar, 1982