UYTVEN, R. van. G.S. Gramulla, Handelsbeziehungen Kölner Kaufleute zwischen 1500 und 1650. BMGN - Low Countries Historical Review, [S. l.], v. 89, n. 2, p. 293–295, 1974. DOI: 10.18352/bmgn-lchr.1822. Disponível em: https://bmgn-lchr.nl/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-101982. Acesso em: 8 may. 2024.