Journal article (2007) - PWA Willems (author), T. Van Walsum (author), PA Woerdeman (author), E.B. van de Kraats (author), GAP de Kort (author), WJ Niessen (author), W.J. Niessen (author), Wiro J. Niessen (author), W. J. Niessen (author), Wiro Niessen (author), JWB van der Sprenkel (author)