Souza, Edicarlos Damacena, et al. “Physical Attributes of a Typic Quartzipisamment and a Rhodic Hapludox under Different Management Systems”. Pesquisa Agropecuaria Brasileira, vol. 40, no. 11, Nov. 2005, pp. 1135-9, doi:10.1590/S1678-3921.pab2005.v40.7075.