Journal article (1998) - L Musilek (author), T Cechak (author), D Baimolda (author), H.T. Wolterbeek (author), Hubert Wolterbeek (author), H. T. Wolterbeek (author), Bert Wolterbeek (author), Hubert Th Wolterbeek (author), HT Wolterbeek (author), Hubert T. Wolterbeek (author), Hubert Th. Wolterbeek (author), TG Verburg (author)