1. a. Geus, E.R., Bakker, W.J.W , Verheijen, P.J.T, Exter M.J. den, Moulijn, J.A. and Bekkum, H. van (1992), in J.B. Higgins, R. von Ballmoos and M.M.J. Treacy (Eds.), Proc. 9th Int. Zeol. Conf., Butterworth-Heinemann,in press;
2. b. Geus, E.R., Exter, M.J. and Bekkum, H. van, Faraday Trans., in press.
3. Geus, E.R., Bakker, W.J.W., Moulijn, J.A. and Bekkum, H. van, macroporous materials, submitted.
4. Barrer R.M. (1990), J.Chem.Soc.,Faraday Trans., 86, 1123.
5. Post, M.F.M. (1991), Introduction to zeolite science and practice, Bekkum, H. van, Flanigen, E.M. and Jansen, J.C. (Eds), Elsevier Science Publishers B.V., Amsterdam, 392–441.