SCHALIN, Johan. Nordic umlaut, contrastive features and stratal phonology. Nordlyd, Tromsø, Norway, v. 45, n. 1, p. 7–37, 2021. DOI: 10.7557/12.6249. Disponível em: https://septentrio.uit.no/index.php/nordlyd/article/view/6249. Acesso em: 4 may. 2026.