Originál: ALAP a Prelude to Contrapunctus IX of the Art of the Fugue. Charles Wuorinen. Cello sheet music. Viola sheet music. 1938-.
Překlad: ALAP a Prelude to Contrapunctus IX of the Art of the Fugue composed by Charles Wuorinen. Cello noty. Viola notový záznam. 1938 -.