1. Tucker, D. in Handbook of Sensory Physiology Vol. VI, pt 1 (ed. Beidler, L. M.) 151–181 (Springer, Berlin, 1971).
2. Cain, W. S. Ann. N. Y. Acad. Sci. 237, 28–34 (1974).
3. Stone, H., Carregal, E. J. & Williams, B. Life Sci. 5, 2195–2201 (1966).
4. Stone, H., Williams, B. & Carregal, J. A. Expl Neurol. 21, 11–19 (1968).
5. Stone, H. in Olfaction and Taste III (ed. Pfaffmann, C.) 216–220 (Rockefeller University Press, New York, 1969).