1. Chuiko, A.A. and Gorlov, Yu.I., Kremnezemy v meditsine i biologii (Silicas in Medicine and Biology), Moscow, 1993.
2. Afanas’eva, E.E., Efremenko, V.I., Tyumentseva, I.S., et al., Available from VINITI, 2007, no. 66.
3. Gaida, A.V. and Staroverov, S.M., Zh. Vses. Khim. O-va im. D.I. Mendeleeva, 1989, vol. 34, no. 3, p. 350.
4. W. F. Hillebrand, G. E. F. Lundell, H. A. Bright, and J. I. Hoffman, Applied Inorganic Analysis: With Special Reference to the Analysis of Metals, Minerals, and Rocks, 2nd ed., New York: Wiley, 1963. Transalted under the title Prakticheskoe rukovodstvo po neorganicheskomu analizu, Moscow: Khimiya, 1966.
5. Tertykh, V.A., Ads. Adsorbenty, 1983, no. 11, p. 3.