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A. P. Gravina and E. H. Brizola, “O estudo do futuro perifrástico e do futuro sintético com verbos hipotéticos no português brasileiro / The study of the periphrastic future and the synthetic future tenses with hypothetical verbs in Brazilian Portuguese”, Rev. Est. Ling., vol. 27, no. 3, pp. 1313–1344, Jul. 2019.