FISCHER-JØRGENSEN, . E.; RISCHEL, J. Experiments with Sharp Filtering of Danish and German Vowels. Annual Report of the Institute of Phonetics University of Copenhagen, [S. l.], v. 1, p. 89–90, 1967. DOI: 10.7146/aripuc.v1i.130583. Disponível em: https://tidsskrift.dk/ARIPUC/article/view/130583. Acesso em: 4 may. 2024.