Namiuti, Cristiane, and Carlos Mioto. “Pronoun Clitics and Sentential Negation in Portuguese: Some Elements for Grammar Description”. Filologia E Linguística Portuguesa, vol. 16, no. esp., Dec. 2014, pp. 95-123, https://doi.org/10.11606/issn.2176-9419.v16ispep95-123.