Daniel L. Schwartz and Nathan P. Gibson (eds.), "Brooks, Select Letters of Severus, vol. 2.1" in last modified October 26, 2015, http://syriaca.org/cbss/668
  
    
      
        
          
            
              E. W.
              Brooks
            
          
          Translation
          
            Williams and Norgate
            Oxford
            1903
          
        
        
          
            
              E. W.
              Brooks
            
          
          The Sixth Book of the Select Letters ofSeverus Patriarch of Antiochin the Syriac Version ofAthanasius of Nisibis
          
          http://syriaca.org/cbss/675
          
            Williams and Norgate
            Oxford
          
          2 vols. in 4 parts
          2.1
        
        http://syriaca.org/cbss/668