1. Albuquerque, E. X., and Adler, M., 1974, unpublished observations.
2. Albuquerque, E. X., Barnard, E. A., Porter, C. W., and Warnick, J. E., 1974, The density of acetylcholine receptors and their sensitivity in the postsynaptic membrane of muscle endplates, Proc. Nat. Acad. Sci. U.S.A. (in press).
3. Albuquerque, E. X., Sokoll, M. D., Sonesson, B., and Thesleff, S., 1968, Studies on the nature of the cholinergic receptor, Europ. J. Pharmacol. 4:40.
4. Augustinsson, K.-B., 1963, Classification and comparative enzymology of the cholinesterases, and methods for their determination, in: Handbuch der Experimentellen Pharmakologie, Vol. 15 (G. B. Koelle, ed.), pp. 89–128, Springer-Verlag, Berlin.
5. Austin, L., and Berry, W. K., 1953, Two competitive inhibitors of Cholinesterase, Biochem. J. 54:695.