Journal article (1998) - MJC van de Homberg (author), A.H. Verbruggen (author), PFA Alkemade (author), P.F.A. Alkemade (author), Paul F.A. Alkemade (author), Paul Alkemade (author), P. F.A. Alkemade (author), S Radelaar (author), E Ochs (author), K Armbruster-Dagge (author), A Seeger (author), H Stoll (author)