Sampaio, Everardo V. S. B., et al. “Nutrient Cycling at Dois Irmãos Forest (Recife, PE, Brazil) through Litterfall”. Pesquisa Agropecuaria Brasileira, vol. 23, no. 10, Apr. 2014, pp. 1055-61, doi:10.1590/S1678-3921.pab1988.v23.14035.