Там же. Т. 2. С. 106, 108.

Thayer, vol. 1, ch. 21.

Ferdinand Ries, ‘Biographische Notizen über Ludwig van Beethoven’ (1838), in O. G. Sonneck (ed.), Beethoven: Impressions by His Contemporaries (New York: Schirmer, 1926), p. 54.