K.J. Heidecker, Kerk, huwelijk en politieke macht. De zaak Lotharius II (855-869). BMGN - Low Countries Historical Review, [S. l.], v. 114, n. 4, p. 577–579, 1999. DOI: 10.18352/bmgn-lchr.5092. Disponível em: https://ojstest.minions.amsterdam/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-105839.. Acesso em: 18 sep. 2024.