Onyumbe, Michel Onokoko, and Joseph Koni Muluwa. “Les réflexes Du Proto-Bantu En cíbìnjì Cyà ngúsú, Langue Bantu L231 (Kasaï Central, RD Congo)”. Nordic Journal of African Studies 28, no. 3 (December 31, 2019): 30. Accessed May 5, 2024. https://njas.fi/njas/article/view/450.