L. Lindegren et al. (2016). “Gaia Data Release 1 Astrometry: one billion positions, two million proper motions and parallaxes”. Astronomy & Astrophysics595: id.A4, 32 pp. Bibcode: 2016A&A...595A...4L. doi:10.1051/0004-6361/201628714.
L. Lindegren et al. (2016). “Gaia Data Release 1 Astrometry: one billion positions, two million proper motions and parallaxes”. Astronomy & Astrophysics595: id.A4, 32 pp. Bibcode: 2016A&A...595A...4L. doi:10.1051/0004-6361/201628714.