Ugo Zanetti and Nathan P. Gibson (eds.), "A confrontation of the main hagiographic accounts of the Najrān persecution" in Arabian Studies in Honour of Mahmoud Ghul last modified January 4, 2016, http://syriaca.org/bibl/1028
    
        
            
                
                    
                        J.
                        Ryckmans
                    
                    A confrontation of the main hagiographic accounts
                     of the Najrān persecution
                    http://syriaca.org/bibl/1028
                
                
                    
                        M.M.
                        Ibrahim
                    
                    Arabian Studies in Honour of Mahmoud Ghul
                    
                        Wiesbaden
                        1989
                    
                    113-133