1. Dahlström, A., and Fuxe, K., Acta physiol. scand., 62, Suppl. 232, 1–55 (1964).
2. Ungerstedt, U. Acta physiol. scand., 82, Suppl. 367, 1–48 (1971).
3. Sokoloff, L., et al., Trans. Am. Soc. Neurochem., 5, 85 (1974).
4. Kennedy, C., et al., Science, 187, 850–853 (1975).
5. Sharp, F. R., in Abstr. 4th A. Mtg. Soc. Neurosci. (Soc. for Neuroscience Bethesda, Maryland 1974).