Thesen zu Gewerkschaftsanalyse. PROKLA. Journal of Critical Social Science, Berlin, DE, v. 2, n. 2, p. 87–106, 1972. DOI: 10.32387/prokla.v2i2.1234. Disponível em: https://www.prokla.de/index.php/PROKLA/article/view/1234. Acesso em: 30 dec. 2025.