1. - B.K.C. Theng, ‘The Chemistry of Clay-Organic Reactions’, Hilger, London, 1974.
2. - J.M. Thomas, ‘Intercalation Chemistry’, M.S. Whittingham and A.J. Jacobson, Ed. Academic Press, New York, 1982, chapter 3.
3. - M. Frenkel and L. Heller Kallai, Clays and Clay mineral, 31, 92 (1983).
4. - E.C. Taylor and C.S. Chiang, Synthesis, 467 (1977). V.M. Thuy and P. Maitte, Bull. Soc. Chim. Fr., 264 (1978).
5. - A. Cornelis, P. Laszlo and P. Pennetreau, Clay Miner. 18, 437 (1983) and cited references.