1. BURN, J. H.: The Autonomic Nervous System, Oxford. Blackwell Scientific Publications (1968).
2. CARTER, M.K. and ATKINSON, S.L.: Fed. Proc. 20 [I] 412 (1961).
3. CARTER, M.K., HEMSTREET, G.K. And REID, J.W.: Pharmacologist 3:57 (1961).
4. DAVIES, J.E., MANN, J.B. And TOCCI, P.M.: Annals, N.Y. Acad. Sc. 160: 323, (1969).
5. GREEN, A.F. And SIM, M.F.: Brit, J. Pharma. Co. Chemother. 17; 464 (1961).