Souza, C.L.O. de et al. 2017. Interannual variability of precipitation in brazilian semi-arid cities between 1984 and 2015. Revista Verde de Agroecologia e Desenvolvimento Sustentável. 12, 4 (Oct. 2017), 740–747. DOI:https://doi.org/10.18378/rvads.v12i4.5626.