N. Gutierrez, J. de S. Neto, G. Baker, and A. J. de Boer, “Small ruminant exploitation in Ceará state. A vision of capital, income and costs”., PAB, vol. 24, no. 5, pp. 509–516, Apr. 2014, doi: 10.1590/S1678-3921.pab1989.v24.15778.