Book (2008) - W.G.M. Maas (author), R Bakker (author), H Ovink (author), IJ Opstelten (author), D.F. Sijmons (author), Abram de Swaan (author), Stephan Veen (author), Agnes van Berg (author), John Bos (author), JA Bussemaker (author), Kees Christiaanse (author), Anton Geesink (author), Jaap Ginneken (author), H Mommaas (author), Liesbeth van Tongeren (author)

Journal article (1999) - JHGM van Beek (author), HGJ van Mil (author), RB King (author), FJJ de Kanter (author), DJC Alders (author), GJ Harrison (author), JA Bussemaker (author)

Journal article (1999) - J van Beek (author), HGJ van Mil (author), DJC Alders (author), ABJ Groeneveld (author), AA van Lambalgen (author), FJJ de Kanter (author), GJ Harrison (author), JA Bussemaker (author)