Ugo Zanetti and Nathan P. Gibson (eds.), "Das Perlenlied" in Orientalia last modified January 4, 2016, http://syriaca.org/bibl/989
    
        
            
                
                    
                        R.
                        Köbert
                    
                    Das Perlenlied
                    http://syriaca.org/bibl/989
                
                
                    Orientalia
                    
                        1969
                    
                    New Series
                    38
                    449-456