- document
- Hengst, S. (author) public lecture 1994
- document
- Hengst, S. (author), Hemler, A.W.G. (author), Stijnen, P. (author) master thesis 1988
- document
- Hengst, S. (author), Reyes, R.A. (author), Saurwalt, K.J. (author) master thesis 1988
- document
- Hengst, S. (author), Stijnen, P. (author) other 1986
- document
- van Lohuizen, M. (author), Hengst, S. (author), Stijnen, P. (author) master thesis 1985