1. Clark, A. J. 1937. Handbook of Experimental Pharmacology, Vol. IV: General Pharmacology. Springer-Verlag, Berlin and New York.
2. Koelle, G. B. 1975. Neurohumoral transmission and the autonomic nervous system. In: The Pharmacological Basis of Therapeutics. L. S. Goodman and A. Gilman, eds. Macmillan, New York. pp. 404–444.
3. De Feudis, F. V. 1975 Amino acids as central neurotransmitters. Annu. Rev. Pharmacol.
15: 105–130.
4. Phillis, J W. 1975. The pharmacology of neurons in the central nervous system. In: Cellular Pharmacology of Excitable Tissues. T. Narahashi, ed. Thomas, Springfield, Illinois. pp. 3–88.
5. Brimblecombe, R. W. 1974. Drug Actions on Cholinergic Systems. Univ. Park Press, Baltimore.