1. Guth, J.L., Kessler, H., Bourgogne, M. and Wey, R. Fr. Pat. 2 564 451 (1985)
2. Guth, J.L., Kessler, H., Bourgogne, M., Wey, R. and Szabo G. Fr. Pat. 2 567 868 (1986)
3. Guth, J.L., Kessler, H., Wey, R. and Faust. A.C. Fr. Pat. 85-07978 (1985);
4. PCT Int. Appl. WO 86–07045 (1986)
5. Proceedings of the 7th International Zeolite Conference;Guth,1986