1. Taramasso, M., Perego, G. and Notari, B. US Pat. 4 410 501 (1983)
2. A Review and New Perspectives in Zeolite Crystallization;Flanigen,1973
3. Proceedings of the 5th Symposium on Scientific Bases for the Preparation of Heterogeneous Catalysts;Bellussi,1990
4. Padovan, M., Leofanti, G. and Roffia, P. Eur. Pat. Appl. 0 311 983 (1988)
5. Bellussi, G., Carati, A., Clerici, M.G., Esposito, A., Millini, R. and Buonomo, F. Belg. Pat. 1 001 038 (1989)