1. in : Nonstoichiometric Compounds. Academic Press, New York 1964, S. 309.
2. Molecular Sieves
3. : Clay Mineralogy. McGraw-Hill, New York 1968;
4. in : Organic Geochemistry. Springer, Berlin 1969, S. 737;
5. : The Chemistry of Clay-Organic Reactions. A. Hilger, London 1974.