1. Khorram, T.: The interaction effect of seive openess and thresher clearence on threshing quality, in Thesis of Master scienc. Department of Biosystem engineering. University of Mohaghegh Ardabili. Ardabil, Iran (2013)
2. Singh, A., Garg, I., Sharma, V.: Effect of different crop and operational parameters of a combine on grain damage during paddy harvesting. J. Res. 38(3 and 4), 241–252 (2001)
3. FAO, FAOSTAT data base. FAO, Rome (2008)
4. Craessaerts, G., et al.: A genetic input selection methodology for identification of the cleaning process on a combine harvester, Part I: Selection of relevant input variables for identification of the sieve losses. Biosys. Eng. 98(2), 166–175 (2007)
5. Maertens, K., Reyniers, M., De Baerdemaeker, J.: Design of a Dynamic Grain Flow Model for a Combine Harvester (2001)