Horváth, Csaba, et al. “Impact of Nitrogen Topdressing on the Performance of Wheat Yield and Grain Protein”.
COLUMELLA – Journal of Agricultural and Environmental Sciences, vol. 2, no. 2, Dec. 2015, pp. 17-22,
https://doi.org/10.18380/SZIE.COLUM.2015.2.2.17.