M. J. O. Dias Filho, M. C. Barbosa de Araújo, J. S. Silva-Cavalcanti, and A. C. Matos da Silva, “Contamination of Boa Viagem Beach (Pernambuco State, Brazil) by marine litter: relationship with its usage”, Arq. Cien. Mar, vol. 44, no. 1, May 2011.