Alves Wiedemer, D. 2016. The Deontic Modality in Impersonal Completive Constructions Composed of a Matrix Clause with ser + preciso: a Cognitive-Functional Analysis. Estudos Linguísticos (São Paulo. 1978). 45, 1 (Nov. 2016), 100–114. DOI:https://doi.org/10.21165/el.v45i1.775.