- document
- Coeveld, E.M. (author) report 2003
- document
- Lubbers, C.L. (author), Klein Breteler, M. (author) report 2000
- document
- Klein Breteler, M. (author) report 2000
- document
- Waal, J.P. de (author) report 1993
- document
- Derks, H. (author), Klein Breteler, M. (author) report 1992