1. Alietti, A., Brigatti, M. E. &Poppi, L. (1977): Natural Carich clinoptilolites (heulandites of group 3): new data and review. - N. Jb. Miner. Mh.,11, 493–501.
2. Berger, W. H. &Von Rad, U. (1972): Cretaceous and Cenozoic sediments from the Atlantic Ocean. - In: Hayes, et al., Initial Repts., DSDP,14, 787–954, Washington (U.S. Govt. Printing Office).
3. Boles, J. R. (1972): Composition, optical properties, cell dimension, and thermal stability of some heulandite group zeolites.- Amer. Mineral.,57, 1463–1493.
4. - &Wise, W. S. (1978): Nature and origin of deep-sea clinoptilolite. - In: Sand, L. B. & Mumpton, F. A. (eds.), Natural Zeolite: Occurrence, Properties, Use, 235–243.
5. Bonatti, E.(1963): Zeolites in Pacific pelagic sediments. - N.Y. Acad. Sci. Trans., Ser. II,25, 938–948.