1. 1000 million stars with 100 CCD detectors;de Brujine,2010
2. A few metrological aspects of the Gaia mission;Mignard,2011
3. Gaia: organisation and challenges for the data processing;Mignard,2008
4. The Gaia mission: science, organization and present status;Lindegren,2008
5. Gaia downlink data processing;Siddiqui,2014