P. Brum, M. Teixeira, R. Miranda, R. Vimieiro, W. Meira Jr, and G. Pappa. " A Characterization of Portuguese Tweets Regarding the Covid-19 Pandemic", in Anais do VIII Symposium on Knowledge Discovery, Mining and Learning, Evento Online, 2020, pp. 177-184, doi: https://doi.org/10.5753/kdmile.2020.11974.