Authors: Veerman, Jan W.. --- Straathof, M.A.E. --- Treffers, Ph.D.A. --- Van den Bergh, B.R.H. --- Ten Brink, L.T. --- et al. van Rossum, J.H.A. --- Vermeer, A.
Year: 1997 Publisher: Lisse Swets en Zeitlinger

Authors: Treffers, Ph.D.A.. --- Goedhart, A.W. --- Veerman, Jan W.. --- Van den Bergh, B.R.H. --- Ackaert, L. --- et al. De Rycke, L.
Year: 2002 Publisher: Lisse Swets & Zeitlinger