1. Middle ear function in a monotreme: the echidna (Tachyglossus aculeatus);Aitkin;J. Exp. Zool.,1972
2. Entwicklung und Bau des inneren Gehörorganes von Echidna aculeata;Alexander;Denkschr. Med. Naturwissens. Ges. Jena,1904
3. Evolution of the auditory system in Synapsida (“mammal-like reptiles” and primitive mammals) as seen in the fossil record;Allin,1992
4. Evolution of the mammalian middle ear;Allin;J. Morphol.,1975
5. The auditory apparatus of advanced mammal-like reptiles and early mammals;Allin,1986