Assis, Cristiane Pereira de, et al. “Carbon and Nitrogen in Aggregates of an Oxisol Submitted to Different Use and Management Systems”. Pesquisa Agropecuaria Brasileira, vol. 41, no. 10, Oct. 2006, pp. 1541-50, doi:10.1590/S1678-3921.pab2006.v41.7314.