- document
- Maaten, R. (author) report 2000
- document
- Verheij, H.J. (author), Huyskens, R.B.H. (author) report 1993
- document
- Vermeer, A.C.M. (author) report 1985
- document
- Vermeer, A.C.M. (author), Deelen, C. (author) report 1981
- document
- Vermeer, A.C.M. (author), Doorn, T. van (author) report 1978