MOHAMMED, S. A.; HARSÁNYI, E. Drought cycle tracking in Hungary using Standardized Precipitation Index (SPI). Acta Agraria Debreceniensis, [S. l.], n. 2, p. 97-101, 2019. DOI: 10.34101/actaagrar/2/3685. Disponível em: https://ojs.lib.unideb.hu/actaagrar/article/view/3685. Acesso em: 7 aug. 2020.