El Niño-Southern Oscillation and frost occurrence in the Guarapuava-PR region. Research, Society and Development, [S. l.], v. 9, n. 11, p. e689119596, 2020. DOI: 10.33448/rsd-v9i11.9596. Disponível em: https://www.rsdjournal.org/rsd/article/view/9596. Acesso em: 17 dec. 2025.