17. Carl Dahlhaus, Ludwig van Beethoven: Approaches to his Music, tr. Mary Whittall (Oxford: Oxford University Press, 1991), p. 203. Carl Dahlhaus, Gesammelte Schriften in 10 Bänden, ed. Hermann Danuser, VI: 19. Jahrhundert III (Laaber: Laaber-Verlag, 2003), 211.