KETELAAR, F. F. Keverling Buyisman, Ordelen van de Etstoel van Drenthe 1399-1447. BMGN - Low Countries Historical Review, [S. l.], v. 104, n. 2, p. 259–259, 1989. DOI: 10.18352/bmgn-lchr.3078. Disponível em: https://bmgn-lchr.nl/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-103469. Acesso em: 2 may. 2024.