1. G. Perego, G. Bellussi, C. Corno, M. Taramasso, F. Buonomo and A. Esposito, in:Proc. 7th Int. Zeolite Conf, Tokyo 1986, eds. Y. Murakami, A. Iijima and J.W. Ward (Kodansha/Elsevier, Tokyo/Amsterdam, 1986) p. 129.
2. J.S. Reddy, R. Kumar and P. Ratnasamy, Appl. Catal. 58 (1990) L4.
3. A. Thangaraj, R. Kumar and P. Ratnasamy, J. Catal. 131 (1991) 294.
4. J.S. Reddy, S. Sivasanker and P. Ratnasamy, J. Mol. Catal. 71 (1992) 373.
5. P.R.H.P. Rao and A.V. Ramaswamy, Appl. Catal. A 93 (1993) 123.