SCHÜTZ, Bernhard. Progress and Working Hours: A Comparison of the Views of Marx, Keynes and Social Democracy. Momentum Quarterly, Innsbruck, Österreich, v. 3, n. 2, p. 259–269, 2014. Disponível em: https://momentum-quarterly-journal.uibk.ac.at/momentum/article/view/1724. Acesso em: 16 feb. 2026.