== References ==Kransber, D. & H. Mils, "Kastelengids van Nederland, middeleeuwen", Bussem 1979 (ISBN 90 228 3856 0)Kalkwiek, K.A., A.I.J.M.
* Kransber, D. & H. Mils, "Kastelengids van Nederland, middeleeuwen", Bussum 1979 (ISBN 90 228 3856 0)* Kalkwiek, K.A., A.I.J.M.