MAZZARELLA, A.; GIULIACCI, A. The El Niño events: their classification and scale-invariance laws. Annals of Geophysics, [S. l.], v. 52, n. 5, p. 517–522, 2009. DOI: 10.4401/ag-4607. Disponível em: https://www.annalsofgeophysics.eu/index.php/annals/article/view/4607. Acesso em: 20 sep. 2021.