Hujvīrī, ʻAlī ibn ʻUs̲mān, -approximately 1072 ; Abū Yaʻqūb al-Sijistānī, Isḥāq ibn Aḥmad, active 10th century. Kashf ʼal-maḥjūb : risālah dar āʼīn-i Ismāʻīlī ʼaz qarn-i chahārum-i Hijrī. Anjuman-i Īrānshināsī, 1988.