Horváth, Csaba, Katalin M. Kassai, Ferenc H. Nyárai, Zsolt Szentpétery, and Ákos Tarnawa. 2015. “Impact of Nitrogen Topdressing on the Performance of Wheat Yield and Grain Protein”. COLUMELLA – Journal of Agricultural and Environmental Sciences 2 (2): 17-22. https://doi.org/10.18380/SZIE.COLUM.2015.2.2.17.