Conference paper (2002) - A.J. Koenderink-van Doorn (author), AJ Koenderink-van Doorn (author), A.J. van Doorn (author), AJ van Doorn (author), T. Boersema (author), T. Zhou (author), Y Zhou (author), Y Boersema (author), H De Ridder (author), H. Ridder (author), Huib De de Ridder (author), Huib Ridder (author), H de Ridder (author), Huib De De Ridder (author), H. De Ridder (author), Huib De Ridder (author), Huib de Ridder (author), H. de Ridder (author), H Ridder (author), Huib De Ridder (author), CW Jorens (author), A Harteveld (author)