ROVERS, F. C. Kirkels, Architect van onderwijsvernieuwing. Denken en daden van Gerrit Bolkestein 1871-1956. BMGN - Low Countries Historical Review, [S. l.], v. 125, n. 4, 2010. DOI: 10.18352/bmgn-lchr.7178. Disponível em: https://bmgn-lchr.nl/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-108226. Acesso em: 4 jul. 2022.