dos Santos, Henrique Pereira, and Erlei Melo Reis. 1995. “Crop Rotation in Guarapuava, PR Brazil. XVI. Energetic Efficiency of Rotation Systems for Wheat, under No-Tillage”. Pesquisa Agropecuaria Brasileira 30 (2):215-22. https://doi.org/10.1590/S1678-3921.pab1995.v30.4295.