1. K. D. Keefer The Effect of Hydrolysis Conditions on the Structure and Growth of Silicate Polymers 15 in Ref. 1
2. Sol-Gel Transition in Simple Silicate;Brinker;J. Non-Cryst. Solids,1982
3. The Effect of the H2O/TEOS Ratio on the Structure of Gels Derived by the Acid Catalyzed Hydrolysis of Tetraethoxysilane;Strawbridge;Ibid.,1985
4. S. H. Wang L. L. Hench Processing and Properties of Sol-Gel 20 Mol% Na 2 O-80 Mol% SiO 2 (20N) Materials 71 in Ref. 2