Conference paper (2001) - DR Brouwer (author), DR Brouwer (author), Jan Dirk Jansen (author), J. D. Jansen (author), JD Jansen (author), J.D. Jansen (author), S van der Starre (author), C. van Kruijsdijk (author), Cor van Kruijsdijk (author), C.P.J.W. van Kruijsdijk (author), C.W.J. Berentsen (author)