Journal article (2007) - D.G. Georgieva (author), ME kuil (author), TH Oosterkamp (author), HW Zandbergen (author), H. Zandbergen (author), H. W. Zandbergen (author), H.W. Zandbergen (author), Henny W. Zandbergen (author), Henny Zandbergen (author), JP Abrahams (author)