Costa, Carlos Alberto Fagonde, and Luiz da Silva Vieira. “Permanent Ectoparasites of Goats and Sheep in Sobral, Ceara, Brazil”. Pesquisa Agropecuaria Brasileira, vol. 19, no. 5, Apr. 2014, pp. 639-46, doi:10.1590/S1678-3921.pab1984.v19.15727.