BAK, Niels. A physical and physiological study of blowing technique in recorder playing. Annual Report of the Institute of Phonetics University of Copenhagen, [S. l.], v. 10, p. 223–272, 1976. DOI: 10.7146/aripuc.v10i.131138. Disponível em: https://tidsskrift.dk/ARIPUC/article/view/131138. Acesso em: 5 dec. 2025.