Journal article (2002) - PTJ Scheepers (author), D Coggon (author), V Micka (author), V Muzyka (author), HG Neumann (author), J Poole (author), A. Schmidt-Ott (author), F Seiler (author), J Volf (author), I Zwirner-Baier (author), LE Knudsen (author), R Anzion (author), H Autrup (author), S Bogovski (author), RP Bos (author), D Dahmann (author), P Farmer (author), EA Martin (author)