1. S. Yasaki, Y. Yoshino, K. Ihara, K. Ohkubo, US Patent No. 5,208,206 (May 4, 1993).
2. M.F.M. Zwinkels, S.G. Jaras, P. Govind Menon, in: G. Poncelet, et al. (Eds.), Proceedings of the Sixth International Symposium on Scientific Bases for the Preparation of Heterogeneous Catalysts, Elsevier, Amsterdam, 1995.
3. Hydrothermal stability of silica as a support for platinum in an oxidation catalyst
4. C.J. Brinker, G.W. Scherer, Sol–Gel Science: The Physics and Chemistry of Sol–Gel Processes, Academic Press, New York, 1990.
5. S. Middleman, Fundamentals of Polymer Processing, Part 3, McGraw-Hill, New York, 1977 (Chapter 8).