W.H. Nijhof, Kunst, katoen en kastelen. J.H. van Heek (1873-1957). BMGN - Low Countries Historical Review, [S. l.], v. 126, n. 1, p. 123–125, 2011. DOI: 10.18352/bmgn-lchr.7254. Disponível em: https://ojstest.minions.amsterdam/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-108287.. Acesso em: 17 sep. 2024.