BROUWER, J.-W. Pieter Sijpersma, Hans Wiegel. De biografie . BMGN - Low Countries Historical Review, [S. l.], v. 136, 2021. DOI: 10.51769/bmgn-lchr.11080. Disponível em: https://bmgn-lchr.nl/article/view/11080. Acesso em: 25 apr. 2024.