Neto, J. de S., Baker, G. A., & de Sousa, F. B. (1995). Socioeconomical analysis of goats and sheep exploitation in Piauí State, Brazil. Pesquisa Agropecuaria Brasileira, 30(8), 1017–1030. https://doi.org/10.1590/S1678-3921.pab1995.v30.4392