- document
- Sloff, C.J. (author) report 2005
- document
- report 2002
- document
- Struiksma, N. (author), Stolker, C. (author) report 2000
- document
- Heijer, F. den (author), Schijndel, S.A.H. van (author), Sloff, C.J. (author), Wal, M. van der (author), Voorthuizen, J.M. van (author), Verheij, H.J. (author) report 1997
- document
- Driel, G. van (author), Meijer, D.G. (author), Verheij, H.J. (author) report 1993