1. Folkow, B., Heymans, C., and Neil, E., Handbook of Physiology, Section 2, Circulation, 3 (Amer. Physiol. Soc., Washington, 1965).
2. Rushmer, R. F., Handbook of Physiology, Section 2, Circulation, 1, 533 (Amer. Physiol. Soc., Washington, 1962).
3. Uvnäs, B., Handbook of Physiology, Section 1, Neurophysiology, 2, 1131 (Amer. Physiol. Soc., Washington, 1960).
4. Folkow, B., and Rubinstein, E. H., Acta Physiol. Scand., 65, 292 (1965).
5. Abrahams, V. C., Hilton, S. M., and Zbrozyna, A. W., J. Physiol., 171, 189 (1964).