BENNETT, Wm. G.; BRAVER, Aaron. The productivity of ‘unnatural’ labial palatalization in Xhosa. Nordlyd, Tromsø, Norway, v. 42, n. 1, p. 33–44, 2016. DOI: 10.7557/12.3738. Disponível em: https://septentrio.uit.no/index.php/nordlyd/article/view/3738. Acesso em: 3 may. 2026.