Conference paper (1999) - JA Kozubowski (author), J Borysiuk (author), H.W. Zandbergen (author), H. Zandbergen (author), Henny W. Zandbergen (author), Henny Zandbergen (author), HW Zandbergen (author), H. W. Zandbergen (author), J Grezegory (author), JL Weyher (author), S Porowski (author)