W. Kirkendale, pp. 1-44. (EN) Ursula Kirkendale, The Source for Bach's Musical Offering, in Journal of the American Musicological Society, num. 33, Richmond, American Musicological Society, 1980, ISSN 0003-0139 (WC · ACNP).
U. Kirkendale, pp. 99-141. (EN) Warren Kirkendale, Ciceronians versus Aristotelians on the Ricercar as Exordium from Bembo to Bach, in Journal of the American Musicological Society, num. 32, Richmond, American Musicological Society, 1979, ISSN 0003-0139 (WC · ACNP).
Forkel, II, p. 10. (DE) Johann Nikolaus Forkel, Über Johann Sebastian Bachs Leben, Kunst und Kunstwerke. Für patriotische Verehrer echter musikalischer Kunst, Lipsia, Hoffmeister & Kühnel, 1802. (rist. Francoforte sul Meno, 1950, consultabile in Wikisource).
worldcat.org
W. Kirkendale, pp. 1-44. (EN) Ursula Kirkendale, The Source for Bach's Musical Offering, in Journal of the American Musicological Society, num. 33, Richmond, American Musicological Society, 1980, ISSN 0003-0139 (WC · ACNP).
U. Kirkendale, pp. 99-141. (EN) Warren Kirkendale, Ciceronians versus Aristotelians on the Ricercar as Exordium from Bembo to Bach, in Journal of the American Musicological Society, num. 32, Richmond, American Musicological Society, 1979, ISSN 0003-0139 (WC · ACNP).