BLOCKMANS, W. R. Doehaerd, Oeconomica mediaevalia. BMGN - Low Countries Historical Review, [S. l.], v. 102, n. 1, p. 57–58, 1987. DOI: 10.18352/bmgn-lchr.2778. Disponível em: https://bmgn-lchr.nl/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-103043. Acesso em: 3 may. 2024.