7J. Kerman, The Beethoven Quartets, New York: A. Knopf, 1967, p. 10.
8J. Kexman, A. Tyson, " Beethoven" , ( 13 ) Early Vienna Period, The New Grove Dictionary of Music and Musicians, London: Macmillan, 1980, Vol. 2, p. 379.
9Carl Dahlhaus, Nineteenth-Century Music, Eng. trans, by J. B. Robinson, Berkeley and Los Angeles: University of California, pp. 13-15.
10Carl Dahlhaus, Nineteenth-Century Music, Eng. trans, by J. B. Robinson, Berkeley and Los Angeles: University of California, pp. 14.
