1. Ingarden, Roman. 1986.The Work of Music and the Problem of Its Identity, Edited by: Czerniawski, Adam and Harrell, Jean G. 9–23. 34–40. Berkeley and Los Angeles: University of California Press.
2. The History of Remembered Innovation: Tradition and Its Role in the Relationship between Musical Works and Their Performances
3. Newman, William S. 1988.Beethoven on Beethoven: Playing his Piano Music his Way., 84ffNew York: W. W. Norton & Co.
4. Schindler, Anton. 1966.Beethoven as I Knew Him, Edited by: Jolly, Constance S. 2 vols. in 1, 423 fnChapel Hill: The University of North Carolina Press. annot. Donald W. MacArdle from the 3rd ed. of 1860.