- document
- Gils, J.A.G. van (author), Boderie, P.M.A. (author), Meijers, E.M. (author), Baretta-Bekker, J.G. (author) report 2007
- document
- Hooijer, A. (author), Bakkum, R.C.J. (author) report 2002
- document
- Fokkink, R.J. (author), Los, F.J. (author) report 1998
- document
- Laguzzi, M.M. (author) report 1997