VEEN, T. W.J. Buma, W. Ebel, M. Tragter-Schubert, Westerlauwerssches Recht, I, Jus Municipale Frisonum, I en II. BMGN - Low Countries Historical Review, [S. l.], v. 95, n. 2, p. 396–399, 1980. DOI: 10.18352/bmgn-lchr.2165. Disponível em: https://bmgn-lchr.nl/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-102340. Acesso em: 30 jan. 2023.