Journal article (2009) - K Witrisal (author), Geert Leus (author), Geert J.T. Leus (author), G. J. T. Leus (author), G Leus (author), G.J.T. Leus (author), GJT Leus (author), G. Leus (author), G.J.M. Janssen (author), Gerard J.M. Janssen (author), GJM Janssen (author), Gerard Janssen (author), M Pausini (author), F Troesch (author), T Zasowski (author), J Romme (author)