Immunocytochemical Localization of Serotonin and Neuropeptides in the Neuroendocrine Paraneurons of Teleost and Lungfish Gills. - Zaccone, G.; Lauweryns, J. M.; Fasulo, S.; Tagliafierro, G.; Ainis, L.; Licata, A. (Acta Zoologica, 1992)