- document
- Takken, R.J.J.F. (author), Otten, S. (author) other 1995
- document
- Beenen, M. (author), Holterman, M.M. (author), Klimp, T. (author), Kuijpers, W. (author), Zwets, B. (author) other 1994
- document
- Hengst, S. (author) other 1993
- document
- CCG (author) other 1993
- document
- CCG (author) other 1993
- document
- Leupen, J. (author) other 1990
- document
- VNSI (author) other 1988
- document
- VNSI (author) other 1987