R.C. van Caenegem, F.L. Ganshof, Guide to the sources of medieval history. BMGN - Low Countries Historical Review, [S. l.], v. 94, n. 1, p. 106–107, 1979. DOI: 10.18352/bmgn-lchr.2076. Disponível em: https://ojstest.minions.amsterdam/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-102251.. Acesso em: 2 jul. 2024.