Aplin, K., Dickman, C., Salas, L. & Helgen, K. 2016. Tachyglossus aculeatus. The IUCN Red List of Threatened Species 2016: e.T41312A21964662. doi:10.2305/IUCN.UK.2016-2.RLTS.T41312A21964662.en, Downloaded on 03 August 2018.
Ashwell, K.W.S., Hardman, C.D., and Paxinos, G. 2004. The claustrum is not missing from all monotreme brains. Brain Behaviour and Evolution 64:223–241 PMID15319553
Grigg, G.C., Beard, L.A., and Augee, M.L. 1989. Hibernation in a monotreme, the echidna (Tachyglossus aculeatus). Comparative Biochemistry and Physiology. A, Comparative Physiology 92:609–612 PMID2566425