1. Hunter, J. The Natural History of the Human Teeth: Explaining Their Structure, Use, Formation, Growth, and Diseases (J. Johnson, London, 1778).
2. Owen, R. On the Anatomy of Vertebrates, Vol. II. Birds and Mammals (Longmans, Green and Co., London, 1866).
3. Crompton, A. W. The origin of the tribosphenic molar. In Early Mammals: 2. Symposium Arranged by the Linnean Soc. (ed. Kermack, D. M.) 65–87 (Linnean Society of London, London, 1971).
4. Crompton, A. W. & Hylander, W. L. in The Ecology and Biology of Mammal-like Reptiles (ed. Hotton, N.) 263–282 (Smithsonian Institution Press, Washington DC, 1986).
5. Crompton, A. W. & Hiiemäe, K. Functional occlusion in tribosphenic molars. Nature 222, 678–679 (1969).