- document
- Walstra, D.J.R. (author), Koningsveld, M. van (author), Aarninkhof, S.G.J. (author), Ruessink, B.G. (author) report 2001
- document
- Roelvink, J.A. (author), Koningsveld, M. van (author), Ruessink, B.G. (author), Walstra, D.J.R. (author), Aarninkhof, S.G.J. (author) report 2000