1. O. Barachovsky and H. F. Bradford, J. Neurochem.,48, 787 (1987).
2. R. W. Fuller and J. A. Clemens, Serotonin: Current Aspects of Neurochemistry and Function, New York (1981), p. 433.
3. E. Gallardo and V. D. Ramirez, Proc. Soc. Exp. Biol. (New York),155, 79 (1977).
4. S. P. Kalra and P. S. Kalra, Endocrinol Rev.,4, 311 (1983).
5. J. M. Lauder, J. A. Wallace, M. B. Wilkie, et al., Action of Neurotransmitters and Hormones on the Developing Nervous System, Basel (1983), p. 3.