1. Bernd, P., Gershon, M.D., Nunez, E.A. and Tamir, H., 1979, Localization of highly specific neuronal protein, serotonin binding protein, in thyroid parafollicular cells. Anat. Rec., 193: 257–268.
2. Berneis, K.H., DaPrada, M. and Pletscher, A., 1969, Physicochemical properties of 5-hydroxytryptamine organelles of blood platelets, in: “Agents and Actions’, Birkhauser Verlag Basle, vol. 1, p. 35–38.
3. Calas, A., Besson, M.J., Gaughy, G., Alonso, G., Glowinski, J. and Cheramy, A., 1976, Radioautographic study of in vivo incor-poration of H-monoamines in cat caudate nucleus: identification of serotoninergic fibres. Brain Res., 118: 1–13.
4. Chan-Palay, V., 1975, Fine structure of labelled axons in the cerebellar cortex and nuclei of rodents and primates after intraventricular infusions with tritiated serotonin, J. Anat. Embryol., 148: 285–265.
5. Dahlstrom, A. and Fuxe, R., 1965, Evidence for the existence of monoamine containing neurons in central nervous system. 1) Demonstration of monoamines in the cell bodies of brain stem neurons. Acta Physiol. Scand. 62 Suppl. 232: 1–55.