Hammarström, Harald· Forkel, Robert· Haspelmath, Martin· Bank, Sebastian, επιμ. (2016). «Barikewa». Glottolog 2.7. Jena: Max Planck Institute for the Science of Human History.
Hammarström, Harald· Forkel, Robert· Haspelmath, Martin· Bank, Sebastian, επιμ. (2016). «Mouwase». Glottolog 2.7. Jena: Max Planck Institute for the Science of Human History.