1. P. Scheuerpflug, R. Caps, D. Büttner and J. Fricke, “Apparent Thermal Conductivity of Evacuated SiO2-Aerogel Tiles Under Variation of Radiative Boundary Conditions”, Int. J. Heat and Mass Transfer (to be published 1985 )
2. M. Gronauer, D. Büttner and J. Fricke, “Sound Velocities in Microporous SiO2- Aerogel Tiles”, Report E12-1284-2(1984) Phys. Inst. Universität, D-8700 Würzburg
3. M. Gronauer and J. Fricke, “Acoustic Properties of Microporous SiO2-Aerogel”, Report E12-0685(1985), Phys. Inst. Universität, D-8700 Würzburg (to be published in Acustica)
4. M. Gronauer, D. Büttner and J. Fricke, “Schallgeschwindigkeit in mikroporösen SiO2-Aerogel-Kacheln”, Fortschritte der Akustik -DAGA 85, Stuttgart 1985, p. 643
5. G. Poelz and R. Riethmiiller, Preparation of Silica Aerogel for Cerenkov Counters, DESY81-055,September 1981, Hamburg and references therein