Santos, Henrique Pereira dos, Antonio Luiz Fancelli, and Luiz Henrique Andia. 1997. “Economic Analysis of Crop Rotation Systems for Wheat, over a Two-Year Period, under No-Tillage”. Pesquisa Agropecuaria Brasileira 32 (11):1111-17. https://doi.org/10.1590/S1678-3921.pab1997.v32.4759.