Peça, J.O., University of Évora. Évora, Pakistan

• Spanish Journal of Agricultural Research Vol. 6 No. 2 (2008) - Agricultural engineering
  The forward speed effect on draught force required to pull trailed disc harrows
  Abstract  PDF
• Spanish Journal of Agricultural Research Vol. 6 No. 2 (2008) - Agricultural engineering
  Short communication. Evaluation of the energy requirements in tractor-disc harrow systems
  Abstract  PDF