- document
- Erasme, D. (author), Spiekman, L.H. (author), Herben, C.G.P. (author), Smit, M.K. (author), Groen, F.H. (author) journal article 1997
- document
- van Dam, C. (author), Spiekman, L.H. (author), van Ham, F.P.G.M. (author), Groen, F.H. (author), van der Tol, J.J.G.M. (author), Moerman, I. (author), Pascher, W.W. (author), Hamacher, M. (author), Heidrich, H. (author), Weinert, C.M. (author), Smit, M.K. (author) journal article 1996