Found inRisālaẗ al-Siǧzī ilá ahl Zabīd fī al-radd ʿalá man ankara al-ḥarf wa al-ṣawt / taʾlīf Abī Naṣr ʿUbayd Allâh ibn Saʿīd Ḥātim al-Wāʾilī al-Siǧzī; taḥqīq wa-dirāsaẗ Muḥammad Bā Karīm Bā ʿAbd allâh, 1994. — BnF Service des littératures du monde (arabe), 2022-10-11