AKUMBU, Pius W.; KIESSLING, Roland. Variation in Central Ring: Convergence or divergence?. Linguistic Typology at the Crossroads, Bologna, Italy, v. 3, n. 1, p. 19–42, 2023. DOI: 10.6092/issn.2785-0943/16312. Disponível em: https://typologyatcrossroads.unibo.it/article/view/16312. Acesso em: 3 feb. 2025.