Conference paper (1999) - REI Schropp (author), CHM van der Werf (author), RJ Severens (author), J Winkeler (author), GJ Jongerden (author), M. Zeman (author), MCM van de Sanden (author), CIMA Spee (author), E Middelman (author), LV de Jonge-Meschaninova (author), PMGM Peters (author), AAM van der Zijden (author), M. Besselink (author)