MORFINO, Vittorio. La «Wechselwirkung» in Marx ed Engels. Quaderni Materialisti, [S. l.], n. 17, p. 129–157, 2018. Disponível em: https://mimesisjournals.com/ojs/index.php/quaderni-materialisti/article/view/2225. Acesso em: 5 dic. 2025.