Pimentel, Márcio Sampaio, Helvécio De-Poli, Adriana Maria de Aquino, Maria Elisabeth Fernandes Correia, and Janaina Ribeiro Costa Rouws. 2011. “Bioindicators of Soil Quality in Coffee Organic Cultivation Systems”. Pesquisa Agropecuaria Brasileira 46 (5):546-53. https://doi.org/10.1590/S1678-3921.pab2011.v46.9785.