Stark, James (2003). "Vocal Tremulousness". Bel Canto: A History of Vocal Pedagogy. University of Toronto Press. p. 150. ISBN978-0-8020-8614-3. Archived from the original on 20 August 2023. Retrieved 6 March 2018.
"Philippe Herreweghe". www.concertgebouworkest.nl. Royal Concertgebouw Orchestra. Archived from the original on 15 May 2021. Retrieved 6 March 2018.
derecensent.nl
Rob van der Hilst, "Fluitekruid van Joseph HaydnArchived 2012-04-26 at the Wayback Machine", review of Jan Jaap Haspels, Marije Hulleman, and Bob van Wely, Haydn herboren: 12 originele opnamen uit 1793 (Utrecht: Nationaal Museum van Speelklok tot Pierement, 2004), ISBN90-801699-3-5. De Recensent.nl (2004, accessed January 2014).
doi.org
Knights, F. (1 February 2013). "A farewell to Musica Antiqua Koln". Early Music. 41 (1): 173–174. doi:10.1093/em/cas166. ISSN0306-1078.
Malafronte, Judith (2015). "Vibrato Wars"(PDF). www.earlymusicamerica.org. Early Music America. Archived from the original(PDF) on 6 March 2018. Retrieved 6 March 2018.
jstor.org
Thurston Dart, "Robert ap Huw's Manuscript of Welsh Harp Music", The Galpin Society Journal, Vol 21 (1963). JSTOR841428.
Malafronte, Judith (2015). "Vibrato Wars"(PDF). www.earlymusicamerica.org. Early Music America. Archived from the original(PDF) on 6 March 2018. Retrieved 6 March 2018.
Stark, James (2003). "Vocal Tremulousness". Bel Canto: A History of Vocal Pedagogy. University of Toronto Press. p. 150. ISBN978-0-8020-8614-3. Archived from the original on 20 August 2023. Retrieved 6 March 2018.
"Countertenor". Orchestra of the Age of Enlightenment. Archived from the original on 6 March 2018. Retrieved 6 March 2018.
Rob van der Hilst, "Fluitekruid van Joseph HaydnArchived 2012-04-26 at the Wayback Machine", review of Jan Jaap Haspels, Marije Hulleman, and Bob van Wely, Haydn herboren: 12 originele opnamen uit 1793 (Utrecht: Nationaal Museum van Speelklok tot Pierement, 2004), ISBN90-801699-3-5. De Recensent.nl (2004, accessed January 2014).