1. J. N. Miale, N. Y. Chen, P. B. Weisz: J. Catal.,6, 278 (1966).
2. P. A. Jacobs: Carboniogenic Activity of Zeolites, p. 46. Elsevier, Amsterdam 1977.
3. D. W. Breck, N. A. Acara: U. S. Pat., 711, 565 (1958).
4. V. P. Shiralkar: Ph. D. Thesis, Univ. of Pune, India, July 1980.
5. S. G. Hedge: Ph. D. Thesis, Univ. of Pune, India, January 1983.