Nathan P. Gibson, Vanessa Birkhahn and Hanna Friedel, (eds.), "Sayf al-Islām, Abū l-Fawāris al-Malik al-ʿAzīz Ẓahīr al-Dīn Ṭughtukīn ibn Ayyūb — سيف الإسلام أبو الفوارس الملك العزيز زهير الدين تغتكين بن أيوب " in Communities of Knowledge: Interreligious Networks of Scholars in Ibn Abi Usaybiʿa’s History of the Physicians last modified June 23, 2021, https://usaybia.net/person/2020
   
      
         
            
               Sayf al-Islām, Abū l-Fawāris al-Malik al-ʿAzīz Ẓahīr al-Dīn Ṭughtukīn ibn Ayyūb
               سيف الإسلام أبو الفوارس الملك العزيز زهير الدين تغتكين بن أيوب
               Sayf al-Islām, Abū l-Fawāris al-Malik al-ʿAzīz Ẓahīr al-Dīn Ṭughtukīn ibn Ayyūb, brother of Saladin (d. 593/1197)
               https://usaybia.net/person/2020
               
                  A literary history of medicine: the 'Uyūn al-anbā' fī ṭabaqāt al-aṭibbā' of Ibn Abī Uṣaybi'ah
                  
                  14.54.15