Vieira, Eliane Rosa, et al. “Cellular Proliferation in the Gills of Guppies Exposed to Pequi Ethanolic Extracts”. Revista De Biologia Neotropical Journal of Neotropical Biology, vol. 11, no. 1, Mar. 2015, pp. 58-70, doi:10.5216/rbn.v11i1.22711.