FISCHER-JØRGENSEN, Eli. A note on vowel triangels and quadrangles - an answer to Hans Basbøll. ARIPUC, [S. l.], v. 18, p. 285–291, 1984. DOI: 10.7146/aripuc.v18i.131801. Disponível em: https://tidsskrift.dk/ARIPUC/article/view/131801. Acesso em: 7 dec. 2025.