Ugo Zanetti and Nathan P. Gibson (eds.), "Das Lied von der Perle" in last modified January 4, 2016, http://syriaca.org/bibl/985
    
        
            
                
                    
                        G.
                        Quispel
                    
                    Das Lied von der Perle
                    http://syriaca.org/bibl/985
                
                
                    Eranos-Jahrbuch
                    
                        1965
                    
                    34
                    1-24