NOSRATI, K.; ZAREIEE, A. R. Assessment of meteorological drought using SPI in West Azarbaijan Province, Iran. Journal of Applied Sciences and Environmental Management, [S. l.], v. 15, n. 4, p. 563–569, 2013. DOI: 10.4314/jasem.v15i4. Disponível em: https://www.ajol.info/index.php/jasem/article/view/88628. Acesso em: 21 aug. 2026.