1. Sabelli HC, Giardina WJ: Amine modulation of affective behavior. In Sabelli HC (ed): Chemical Modulations of Brain Function. New York, Raven Press, 1973.
2. Udenfriend S: Molecular biology of the sympathetic nervous system. Pharmacol Rev 24:165–166, 1972.
3. Zeller EA: Comparative physiochemistry of phenylethylamine targets. In Mosnaim AD, Wolf ME (eds): Noncatecholic Phenylethylamines: Biological Mechanisms and Clinical Aspects. New York, Marcel Dekker, 1978.
4. Molinoff PB, Axelrod J: Distribution and turnover of octopamine in tissues. J. Neurochem. 19:157–163, 1972.
5. Cajal SR: Neuron Theory or Reticular Theory? Objective Evidence of the Anatomical Unity of Nerve Cells. (Purkiss MU, Fox, CA (trans)). Madrid, Conseju Superior de Investigaciones Cientificas Instituto Ramon Y Cajal, 1954.