Marx, Keynes, Hayek and the SPD: Economic theories as the key to understanding class relations, economic development and party history. PROKLA. Journal of Critical Social Science, Berlin, DE, v. 49, n. 196, p. 353–369, 2019. DOI: 10.32387/prokla.v49i196.1826. Disponível em: https://www.prokla.de/index.php/PROKLA/article/view/1826. Acesso em: 6 dec. 2025.