Lewisohn Leonard and Shackle Christopher,ʿAttār and the Persian Sufi Tradition. The Art of Spiritual Flight. London, I. B. Tauris Publishers (The Institute of Ismaïli Studies), 2006

Kappler Claire. Lewisohn Leonard and Shackle Christopher,ʿAttār and the Persian Sufi Tradition. The Art of Spiritual Flight. London, I. B. Tauris Publishers (The Institute of Ismaïli Studies), 2006. In: Bulletin critique des annales islamologiques, n°27, 2012. pp. 20-21.

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