Pusceddu, F. H., G. F. Alegre, C. D. S. Pereira, and A. Cesar. “Toxicity Evaluation of Sediments From Santos Estuarine System Employing Sea-Urchin Lytechinus Variegatus (Echinoidea: Echinodermata)”. Ecotoxicology and Environmental Contamination, vol. 2, no. 3, Oct. 2007, pp. 237-42, doi:10.5132/jbse.2007.03.005.