- document
- den Besten, J.H. (author), Dessens, M.P. (author), Herben, C.G.P. (author), Leijtens, X.J.M. (author), Groen, F.H. (author), Leys, M.R. (author), Smit, M.K. (author) journal article 2002
- document
- Herben, C.G.P. (author), Maat, D.H.P. (author), Leijtens, X.J.M. (author), Leys, M.R. (author), Oei, Y.S. (author), Smit, M.K. (author) journal article 1999