1. ESA: 2000, GAIA: Composition, Formation and Evolution of the Galaxy, ESA-SCI(2000)4, http://www.rssd.esa.int/SA-general/Projects/GAIA_files/FILES/report-march.pdf
2. Lindegren, L.: 2005, in: C. Turon, K.S. O'Flaherty, M.A.C. Perryman (eds.), The Three-Dimensional Universe with Gaia, ESA SP-576, p. 29
3. Lindegren, L., O'Mullane, W., Hobbs, D., Lammers, U.: A&A, in prep.
4. GAIA: Composition, formation and evolution of the Galaxy
5. ESA-RSSD Gaia homepage: http://www.rssd.esa.int/GAIA