1. M.E. Davis, C. Saldarriaga, C. Montes, J.M. Garces and C. Crowder, Nature 331 (1988) 698.
2. M.E. Davis, C. Saldarriaga, C. Montes, J.M. Garces and C. Crowder, Zeolites 362 (1988) 8.
3. M.E. Davis, C. Saldarriaga, C. Montes, J.M. Garces and C. Crowder, Mat. Res. Symp. Proc. 111 (1988) 267.
4. M.E. Davis, C. Montes, P.E. Hathaway and J.M. Garces, in:Zeolites: Facts, Figures, Future (Elsevier Sci. Publ. B.V., Amsterdam, 1989) pp. 199?214.
5. C. Saldarriaga and A. Clearfield, Unpublished research.