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/bibl/668
    
        
            
                
                    
                        
                            E. W.
                            Brooks
                        
                    
                    Translation
                    
                        Williams and Norgate
                        Oxford
                        1903
                    
                
                
                    
                        
                            E. W.
                            Brooks
                        
                    
                    The Sixth Book of the Select Letters of Severus Patriarch of Antioch in the Syriac Version of Athanasius of Nisibis
                    
                    http://syriaca.org/bibl/675
                    
                        Williams and Norgate
                        Oxford
                    
                    2 vols. in 4 parts
                    2.1
                
                http://syriaca.org/bibl/668