1. C. Gueguen and J. Bousquet, French Pat. 2492838-A (1980).
2. TMA-offretite. Relationship between structural and catalytic properties
3. C. Gueguen, F. Figueras and F. Fajula, French Pat. Appl., 8307649 (1983).
4. W.J. Ambs, M. Deeba and J.F. White, Eur. Pat. Appl., 403889 (1983).