Groenendijk, J., Leuchtenberger, C., Marmontel, M., Van Damme, P., Wallace, R. & Schenck, C: Pteronura brasiliensisIUCN Red List of Threatened Species. Version 2022-2. 2022. International Union for Conservation of Nature, IUCN, Iucnredlist.org. Viitattu 15.12.2022. (englanniksi)