Parvaneh Vafa and  Rahim Naseri and  Meysam Moradi,  The Effect of Drought Stress on Grain Yield, Yield Components and Protein Content of Durum Wheat Cultivars in Ilam Province, Iran.   journal   = {International Journal of Agricultural and Biosystems Engineering}, [online]. World Academy of Science, Engineering and Technology.
    November 2014, vol. 90(6). 631 - 636
    [viewed 25 February 2020]. Available from: https://publications.waset.org/pdf/9999861.