Treitler 1975, p. 7. Treitler, Leo (Spring 1975). "'Centonate' Chant: Übles Flickwerk or E pluribus unus?". Journal of the American Musicological Society. 28 (1): 1–23. doi:10.2307/830914. JSTOR830914.
Treitler 1975, pp. 14–5, 22–3; Treitler 1974, p. 356. Treitler, Leo (Spring 1975). "'Centonate' Chant: Übles Flickwerk or E pluribus unus?". Journal of the American Musicological Society. 28 (1): 1–23. doi:10.2307/830914. JSTOR830914. Treitler, Leo (July 1974). "Homer and Gregory: The Transmission of Epic Poetry and Plainchant". Musical Quarterly. 60 (3): 333–72. doi:10.1093/mq/LX.3.333.
jstor.org
Treitler 1975, p. 7. Treitler, Leo (Spring 1975). "'Centonate' Chant: Übles Flickwerk or E pluribus unus?". Journal of the American Musicological Society. 28 (1): 1–23. doi:10.2307/830914. JSTOR830914.
Treitler 1975, pp. 14–5, 22–3; Treitler 1974, p. 356. Treitler, Leo (Spring 1975). "'Centonate' Chant: Übles Flickwerk or E pluribus unus?". Journal of the American Musicological Society. 28 (1): 1–23. doi:10.2307/830914. JSTOR830914. Treitler, Leo (July 1974). "Homer and Gregory: The Transmission of Epic Poetry and Plainchant". Musical Quarterly. 60 (3): 333–72. doi:10.1093/mq/LX.3.333.
Hiley, David. (1993). Western Plainchant: A Handbook. Oxford: Clarendon Press; New York: Oxford University Press. pp. 74-5. ISBN0-19-816289-8OCLC25707447.