al- Adab fi 't-turāṯ aṣ-ṣufī - Ḫafāǧī, Muḥammad ʿAbd-al-Munʿim 1915-2006 (Maktabat Ġuraiyib, 1980)
Bibliography: p. 262-270
[Die Literatur der islamischen Mystik, arab.]