Santos, H. P. dos, Fancelli, A. L., & Andia, L. H. (1997). Economic analysis of crop rotation systems for wheat, over a two-year period, under no-tillage. Pesquisa Agropecuaria Brasileira, 32(11), 1111–1117. https://doi.org/10.1590/S1678-3921.pab1997.v32.4759