Erregistroa posta elektronikoz bidali: Alice C. Hunsberger. Nasir Khusraw, The Ruby of Badakhshan. A portrait of the Persian Poet, Traveller and Philosopher. London-New York, I.B.Tauris in association with the Institute of Ismaili Studies, collection « Ismaili Heritage Series », n° 4, 2000, 292 p.