Gálya, Bernadett, Attila Nagy, Lajos Blaskó, Boglárka Dályai, and János Tamás. “Comparison of Pálfai’s Drought Index and the Normalised Precipitation Index in the North Great Plain Region”. Acta Agraria Debreceniensis, no. 63 (February 17, 2015): 59–64. Accessed May 14, 2021. https://ojs.lib.unideb.hu/actaagrar/article/view/1835.