Barone, L. A., A. A. Silva, and E. S. Melazzo. “Spatial Distribution of Rural Workers in Family Farm in Northeast Brazil”. Retratos De Assentamentos, vol. 18, no. 1, Jan. 2015, pp. 247-68, doi:10.25059/2527-2594/retratosdeassentamentos/2015.v18i1.189.