Maqālah fī ʻamal al-musabbaʻ fī al-dāʼirah wa-qismat al-zāwiyat al-mustaqīmat al-khaṭṭain bi-thalāthah aqsām mutasāwiyah.

Author(s):

• Sijzī, Aḥmad ibn Muḥammad, d. 1084 or 5

Manuscripts:

• MS. Marsh 720 (Bodleian Library, Oxford University)
• MS. Thurston 3 (Bodleian Library, Oxford University)

The above references reflect only the current coverage of the online catalogue and may not be comprehensive.