Gholamreza Zarei and  Hossein Shamsi and  Farjam Fazeli,  Effect of Planting Density on Yield and Yield Components of Safflower Cultivars in Spring Planting.   journal   = {International Journal of Agricultural and Biosystems Engineering}, [online]. World Academy of Science, Engineering and Technology.
    December 2011, vol. 60(12). 929 - 931
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/1865.