(1)
dos Santos, H. P.; Reis, E. M. Crop Rotation in Guarapuava. XVII. Energetic Efficiency of Rotation Systems for Barley Crop, under No-Tillage. PAB 1994, 29 (7), 1075-1081. https://doi.org/10.1590/S1678-3921.pab1994.v29.4150.