- document
- Smits, J.G.C. (author), Blauw, A.N. (author), Beek, J.K.L. van (author) report 2003
- document
- Smits, J.G.C. (author) report 2003
- document
- Smits, J.G.C. (author), Blauw, A.N. (author), Nolte, A.J. (author) report 1998
- document
- Noort, J.J. (author), Postma, L. (author) report 1995
- document
- Michielsen, B.F. (author), Bokhorst, M. (author), Los, F.J. (author) report 1995
- document
- Verhagen, J.H.G. (author) report 1979