Oliveira, Rodinelli Borges de, et al. “Detection of Paraneuronal Cells in Guppy (Poecilia Vivipara) Gill Filament Epithelium Determined by Histochemistry and Transmission Electron Microscopy”. Revista De Biologia Neotropical Journal of Neotropical Biology, vol. 3, nº 2, dezembro de 2007, p. 169-76, doi:10.5216/rbn.v3i2.2622.