Pinto, Cristiane Rêgo Oliveira, and Ely Nahas. 2002. “Activity and Microbial Populations Involved in Sulfur Cycling in Soils With Different Vegetations”. Pesquisa Agropecuaria Brasileira 37 (12):1751-56. https://doi.org/10.1590/S1678-3921.pab2002.v37.6527.