1. C. J. Brinker and G.Scherer, Sol-Gel Science: The Physics and Chemistry of Sol-Gel Processing, Academic Press, Boston, 1990;
2. The sol-gel process
3. Sol-Gel Processing of Silicates
4. H. Schmidt and B.Seiferling, in Better Ceramics Through Chemistry II, ed. C. J. Brinker, D. E. Clark and D. R. Ulrich, (Mater. Res. Soc, Proc., vol.73)Materials Research Society, Pittsburgh, PA, 1986, p. 739;
5. A first look at the optical properties of ormosils