Muysken, P., Hammarström, H., Birchall, J., Danielsen, S., Eriksen, L., Galucio, A. V., van Gijn, R., van de Kerke, S., Kolipakam,
V., Krasnoukhova, O., Müller, N., & O’Connor, L. (2014). The languages of South
America: Deep families, areal relationships, and language. In P., Muysken, & L., O'Connor (Eds.),
The native languages of South America: Origins, development, typology (pp. 299-323). Cambridge
[u.a.]: Cambridge Univ. Pr.