JANSEN, J.C.G.M. (Hans). Specifieke kenmerken van de Limburgse economie. Studies over de sociaaleconomische geschiedenis van Limburg, [S. l.], v. 30, p. 56–89, 1985. DOI: 10.58484/ssegl.v30i12748. Disponível em: https://testplatform.openjournals.nl/SSEGL/article/view/12748. Acesso em: 11 apr. 2026.