Journal article (2006) - HJ Brasser (author), G Gurboga (author), JJ Kroon (author), ZI Kolar (author), Hubert Wolterbeek (author), H.T. Wolterbeek (author), H. T. Wolterbeek (author), Hubert Th Wolterbeek (author), Bert Wolterbeek (author), Hubert T. Wolterbeek (author), HT Wolterbeek (author), Hubert Th. Wolterbeek (author), KJ Volkers (author), GC Krijger (author)