Martins’s research while affiliated with University of Lisbon and other places

... Note that all examples found in the corpus are instances of non-agreeing and thus impersonal se constructions. 3 The fact that the pronoun a gente is still frowned upon in the context of school education contributes to the existence of discrepancies on the stylistic level. Thus, the pronoun nós is 148 So far, very little attention has been paid to these constructions, except for the research by Martins (2003Martins ( , 2005Martins ( , 2009. Based on the assumption that the two elements share subject features, the author refers to them as "impersonal subject doubling constructions" (Martins 2009). ...

Reference:

Personal uses of impersonalizing strategies: Hybrid constructions with a gente and se in rural Madeiran Portuguese varieties

... This add-on, among others, raises the question of whether it should hold of other languages. In European Portuguese, for instance, both anti-adjacent and adjacent doubling effects coexist (Martins 2007), and thus a filter like *X X would have to be further specified in an ad hoc manner. In contrast, under Saab's (2008Saab's ( , 2017 general theory of how movement and ellipsis work, the current kind of filter is rendered redundant. ...

Reference:

Mandarin verb doubling as verb-phrase fronting