1. Baumgarten, H. G.: Uptake and distribution of false transmitters and their precursors in adrenergic sympathetic nerves of the guinea-pig vas deferens. In: Morphological aspects of andrology (eds. Holstein, A. F., Horstmann, E.), p. 141?146. Fortschr. Androl., vol. I. Berlin: Grosse 1970.
2. Baumgarten, H. G.: Biogenic monoamines in the cyclostome and lower vertebrate brain. Progr. Histochem. Cytochem. 4, No 1 (1972).
3. Baumgarten, H. G., Björklund, A., Holstein, A. F., Nobin, A.: Chemical degeneration of indolamine axons in rat brain by 5,6-dihydroxytryptamine. Z. Zellforsch. 129, 256?271 (1972).
4. Baumgarten, H. G., Björklund, A., Lachenmayer, L., Nobin, A., Stenevi, U.: Long-lasting selective depletion of brain serotonin by 5,6-dihydroxytryptamine. Acta physiol. scand., Suppl. 373 (1971).
5. Baumgarten, H. G., Björklund, A., Lachenmayer, L., Nobin, A., Stenevi, U.: Studies on the mechanism of action of 5,6-dihydroxytryptamine on the bulbospinal serotonin neuron system. II. Fluorescence microscopical and chemical evidence for a selective degeneration of serotonin axons. To be published (1972).