Book chapter (2001) - Fred J. Vermolen (author), Fred Vermolen (author), F.J. Vermolen (author), FJ Vermolen (author), F. J. Vermolen (author), KR Geel (author), O Barzandji (author), PLJ Zitha (author), P.L.J. L.J. Zitha (author), Pacelli L.J. Zitha (author), Pacelli L.J. Zitha (author), PLJ L.J. Zitha (author), P.L.J. Zitha (author), P. Zitha (author), P. L.J. Zitha (author), Pacelli L.J. L.J. Zitha (author), Pacelli Zitha (author), P. L.J. Zitha (author), P. L.J. L.J. Zitha (author), AM Elfeki (author), H Bruining (author), CJ van Duijn (author)