Gondim, A. I., P. Lacouth, C. Alonso, and C. L. de C. Manso. “Echinodermata from Cabo Branco Beach, João Pessoa, Paraíba, Brazil”. Biota Neotropica, vol. 8, no. 2, June 2008, //www.biotaneotropica.org.br/BN/article/view/404.