- document
- Vonk, M. (author), Michielsen, B.F. (author) report 1998
- document
- Michielsen, B.F. (author), Bokhorst, M. (author), Los, F.J. (author) report 1995
- document
- Rooij, N.M. de (author), Smits, J.G.C. (author), Los, F.J. (author), Stans, J.C. (author), Groot, B.G. de (author), Klomp, R. (author) report 1982