https://www.museumijsselstein.nl/tentoonstelling/kasteelheren/
https://ifthenisnow.eu/nl/agenda/kasteelheren-van-henk-van-rooij-in-expositieruimte-coal2-in-ijsselstein
http://www.wimvansijl.eu/Coal.2/7_KASTEELHEREN.html
