Hipparcos, Venice '97 : Isola di S. Giorgio, Venice,Italy, 13-16 May 1997 : presentation of the Hipparcos and Tycho Catalogues and first astrophysical results of the Hipparcos Space Astrometry Mission. pp.749-754, 1997. Noordwijk. ESA Publications Division
Hipparcos, Venice '97 : Isola di S. Giorgio, Venice,Italy, 13-16 May 1997 : presentation of the Hipparcos and Tycho Catalogues and first astrophysical results of the Hipparcos Space Astrometry Mission. pp.789-794, 1997. Noordwijk. ESA Publications Division