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