Krivián, Ágnes, and Mihály Sárvári. “Effect of NPK Fertilization on the Yield and Yield Stability of Different Maize Genotypes”. Acta Agraria Debreceniensis, no. 48 (July 31, 2012): 101–104. Accessed April 10, 2021. https://ojs.lib.unideb.hu/actaagrar/article/view/2462.