BOTS, A. F. Kalshoven, Over marxistische economie in Nederland, 1883-1939. BMGN - Low Countries Historical Review, [S. l.], v. 110, n. 3, p. 444–446, 1995. DOI: 10.18352/bmgn-lchr.4098. Disponível em: https://bmgn-lchr.nl/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-104709. Acesso em: 26 apr. 2024.