Kovács, Péter, and Mihály Sárvári. “The Effect of NPK Fertilization and the Number of Plants on the Yield of Maize Hybrids With Different Genetic Base in Half-Industrial Experiment”. Acta Agraria Debreceniensis0, no. 69 (March 23, 2016): 103-108. Accessed November 25, 2020. https://ojs.lib.unideb.hu/actaagrar/article/view/1797.