Silva, Fábio Cesar da, Antônio Enedi Boaretto, Ronaldo Severiano Berton, Helder Basaglia Zotelli, Carlos Alberto Pexe, and Elaine Mendonça. 1998. “Sugarcane Grown in Fertilized Soil With Sewage Sludge: Nutrients, Heavy Metals and Productivity”. Pesquisa Agropecuaria Brasileira 33 (1):1-8. https://doi.org/10.1590/S1678-3921.pab1998.v33.4813.