Carvalho, Sávio Jorge da Silva, and Thiago Soares de Oliveira. “Personal and Impersonal Verbs: From Esse to ‘haver’ Denoting Existence”. Filologia E Linguística Portuguesa, vol. 23, no. 1, Sept. 2021, pp. 89-103, https://doi.org/10.11606/issn.2176-9419.v23i1p89-103.