HUGHES, L. ‘Hinged’ activity systems: Expanding the utility of activity theory. Nordic Journal of Vocational Education and Training, [S. l.], v. 7, n. 2, p. 104–127, 2018. DOI: 10.3384/njvet.2242-458X.1772104. Disponível em: https://njvet.ep.liu.se/article/view/159. Acesso em: 22 jan. 2022.