Hammarström, Harald, Robert Forkel, Martin Haspelmath & Sebastian Bank. 2021. Glottolog 4.4.
@book{glottolog, address = {Leipzig}, author = {Harald Hammarström and Robert Forkel and Martin Haspelmath and Sebastian Bank}, howpublished = {Max Planck Institute for Evolutionary Anthropology}, title = {Glottolog 4.4}, url = {https://glottolog.org/ accessed 2021-10-05}, year = {2021} }