- document
- Dirkse, C. (author), Hengst, S. (author), Wisse, M.J. (author) other 1995
- document
- Hengst, S. (author), Dirkse, C. (author) other 1996
- document
- Hengst, S. (author), Dirkse, C. (author), van der Cammen, J.J. (author) other 1998
- document
- Dirkse, C. (author), Wisse, M.J. (author) other 1994
- document
- Boonstra, H. (author), Dirkse, C. (author), Roeleveld, R. (author), de Jong, G. (author) other 1998