Mars, Éva, P. Sipos, N. Boros, Z. Tarján, and Z. Győri. “Effect of Mineral Fertilizers With Different Sulphur Content on the Yield of Winter Wheat in a Small Plot Experiment”. Acta Agraria Debreceniensis, no. 36, Nov. 2009, pp. 97-100, doi:10.34101/actaagrar/36/2798.