1. Peters A, Palay SL, Webster HD (1991) The fine structure of the nervous system, 3rd edn. Oxford University Press, New York
2. Chan-Palay V (1981) Light and electron microscopic autoradiographic techniques: radioactive amino acids, neurotransmitters, receptors, and combined methods with immunocytochemistry. In: Johnson JE (ed) Current trends in morphological techniques. CRC Press, Boca Raton, pp 53–89
3. Mesulam M-M (1981) Enzyme histochemistry of horseradish peroxidase for tracing neural connections with the light microscope. In: Johnson JE (ed) Current trends in morphological techniques. CRC Press, Boca Raton, pp 1–54
4. Schmued LC, Fallon JH (1986) Fluoro-gold: a new fluorescent retrograde axonal tracer with numerous unique properties. Brain Res 377:147–154
5. Gerfen CR, Sawchenko PE (1984) An anterograde neuroanatomical tracing method that shows the detailed morphology of neurons, their axons and terminals: immunohistochemical localization of axonally transported plant lectin, Phaseolus vulgaris leucoagglutinin (PHAL). Brain Res 290:219–238