Hall, Katherine (2007) “hyumma-dɨ”, in Mary Ritchie Key & Bernard Comrie, editors, The Intercontinental Dictionary Series[1], Leipzig: Max Planck Institute for Evolutionary Anthropology, published 2021
Cáceres, Natalia (2011) “jumma”, in Grammaire Fonctionnelle-Typologique du Ye’kwana[2], Lyon