1. H. Kalant, A. E. LeBlanc andR. J. Gibbins, Pharmac. Rev.23, 135 (1971).
2. J. H. Jaffe, inThe Pharmacological Basis of Therapeutits 4th edn. (Eds.L. S. Goodman andA. Gilman, Macmillan, New York 1970), p. 276.
3. A. Shulman, Med. J. Aust.1, 1199 (1970).
4. J. Crossland andB. E. Leonard, Biochem. Pharmac. suppl.72, 103 (1963).
5. G. M. Laycock andA. Shulman, Nature, Lond.213, 995 (1967).—A. Shulman andG. M. Laycock, Eur. J. Pharmac.1, 282 (1967).