1. Gay, G. R., and Way, E. L., 1971, J. Psychedelic Drugs
4:31–39.
2. Jaffee, J. H., and Martin, W. R., 1980, Pharmacological Basis of Therapeutics, 6th ed. (A. G. Gilman, L. S. Goodman, and A. Gilman, eds.), Macmillan Co., New York, pp. 494–502.
3. Weygandt, W., 1935, Lehrbuch der Nerven und Geistes-Krankheiten, Marhold Verlagsbuchhandlung, Halle, West Germany, p. 507.
4. Berridge, V., 1982, Ann. N.Y. Acad. Sci.
398:1–11.
5. Way, E. L., 1982, Ann. N.Y. Acad. Sci.
398:12–23.