1. Verne, J., Les voyages extraordinaires (7ème volume: Autour de la lune), ed. Jean de Bonnot., Paris, 1977 (1st edn. 1895)
2. ASTRE, a highly performant accelerometer for the low frequency range of the microgravity environment;Nati,1994
3. Reiberg, C. CHAMP a challenging micro-satellite payload for geophysical research and application, GFZ Final Report, Postdam Germany, 1995.
4. Gravity field determination from satellite gradiometry;Rummel;Bull. Geod.,1985
5. A spaceborne gravity gradiometer for the nineties;Bernard,1989