1. Anden, N.-E., Corrodi, H., Fuxe, K., and Hökfelt, T., Br. J. Pharmac., 34, 1–7 (1968).
2. Haigler, H. J., and Aghajanian, G. K., J. Pharmac. exp. Ther., 188, 688–699 (1974).
3. Boakes, R. J., Bradley, P. B., Briggs, I., and Dray, A., Br. J. Pharmac., 40, 202–218 (1970).
4. Kawai, N., and Yamamoto, C., Brain Res., 7, 325–328 (1968).
5. Bloom, F. E., in Psychopharmacology, A 10 Year Progress Report, (edit. by Effron, D. H.), 355 (United States Government Printing Office, Washington 1968).