- document
- Hengst, S. (author), Hemler, A.W.G. (author), Stijnen, P. (author) master thesis 1988
- document
- Hengst, S. (author), Stijnen, P. (author) other 1986
- document
- Hengst, S. (author), Stijnen, P. (author) other 1986
- document
- van Lohuizen, M. (author), Hengst, S. (author), Stijnen, P. (author) master thesis 1985
- document
- Doorduin, J.P. (author), Hengst, S. (author), Stijnen, P. (author) master thesis 1984