1. Beidler, L.-M. in Ciba Found Symp. Taste and Smell in Vertebrates (eds Wolstenholme, G. E. W. & Knight, J.) 51–67 (Churchill, London, 1970).
2. Graziadei, P. P. C. in 2nd Symp. Oral Sensation and Perception (ed. Bosma, J. F.) 5–31 (Charles C. Thomas, Springfield, 1970).
3. Reutter, K. Z. Zellforsch. 120, 280–308 (1971).
4. Grover-Johnson, N. & Farbman, A. Cell Tissue Res. 169, 395–403 (1976).
5. Kinnamon, S. C. Trends Neurosci. 11, 491–496 (1988).