F. Hoekstra, In dienst van de BVD. Spionage en contraspionage in Nederland. BMGN-LCHR [Internet]. 2005 Jan. 1 [cited 2024 Sep. 16];120(4):698-9. Available from: https://ojstest.minions.amsterdam/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-107258