FRØKJÆR-JENSEN, Børge; THORVALDSEN, Poul. Construction of a Fabre Glottograph . Annual Report of the Institute of Phonetics University of Copenhagen, [S. l.], v. 3, p. 1–8, 1969. DOI: 10.7146/aripuc.v3i.130687. Disponível em: https://tidsskrift.dk/ARIPUC/article/view/130687. Acesso em: 8 dec. 2025.