VANZULLI, Marco. Marx, a internacional e as trade unions. Crítica Marxista, Campinas, SP, v. 27, n. 50, p. 49–62, 2020. DOI: 10.53000/cma.v27i50.18957. Disponível em: https://econtents.sbu.unicamp.br/inpec/index.php/cma/article/view/18957. Acesso em: 16 out. 2025.