P. Blaas, Betrokkenheid en distantie. Bernard Vlekke (1899-1970) en de studie van de internationale betrekkingen. BMGN - Low Countries Historical Review, [S. l.], v. 109, n. 1, p. 118–119, 1994. DOI: 10.18352/bmgn-lchr.3814. Disponível em: https://ojstest.minions.amsterdam/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-104385.. Acesso em: 22 nov. 2024.