Verruma, A.A. et al. 2017. SOIL AND WEED OCCURRENCE MAPPING AND ESTIMATES OF SUGARCANE PRODUCTION COST. Revista Brasileira de Engenharia de Biossistemas. 11, 1 (Mar. 2017), 68–78. DOI:https://doi.org/10.18011/bioeng2017v11n1p68-78.