1. R. K. Iler, The Chemistry of Silica, Wiley, New York, 1979; R. Szostack, Molecular Sieves, 2nd ed., Blackie Academic and Professional, London, 1998;
2. Ultrastructure Processing of Ceramics, Glasses, and Composites;Henchi,1984
3. Applied Clay Mineralogy;Grin,1962