1. S.S. Kistler, J. Phys. Chem 36, 52 (1932).
2. G. Poelz and Riethmuller, Nucl. Instr. and Meth. 195, 491 (1982).
3. S. Henning and L. Svensson, Physica Scripta 23, 697 (1981).
4. J. Zarzycki in “Glass: Science and Technology”, Vol. 2, Processing I, Ch. 7: “Processing of Gel Glasses”, (eds. D.R. Uhlmann and N.J. Kreidl, Academic, New York, 1984 ) p. 209.
5. J.G. van Lierop, A. Huizing, W.C.P.M. Meerman and C.A.M. Mulder: “Preparation of dried monolithic SiO2 gel bodies by an autoclave process”, to be published in J. Non-Cryst. Solids.