WASET
    Václav Voltr and  Jan Leština,  The Effectiveness of Mineral Fertilization of Winter Wheat by Nitrogen in the Soil and Climatic Conditions in the Cr.   journal   = {International Journal of Agricultural and Biosystems Engineering}, [online]. World Academy of Science, Engineering and Technology.
    November 2011, vol. 59(11). 754 - 759
    [viewed 19 April 2024]. Available from: https://publications.waset.org/pdf/1522.