1. C. Heymans andE. Neil, inReflexogenic Areas of the Cardiovascular System (J. & A. Churchill Ltd., London 1958).
2. J. H. Comroe Jr. inHandbook of Physiology: Respiration (Ed.W. O. Fenn andH. Rahn; American Physiological Society Washington D.C. 1964), p. 557.
3. J. Bernthal, H. E. Motley, F. J. Schwind andW. F. Weeks, Am. J. Physiol.143, 220 (1945).
4. M. de B. Daly andM. J. Scott, J. Physiol., Lond.144 148 (1958).
5. J. H. Comroe andL. Mortimer, J. Pharmac. exp. Ther.146, 33 (1964).