Gaia Collaboration, Brown, A. G. A., Vallenari, A., Prusti, T., de Bruijne, J. H. J., Babusiaux, C., Bailer-Jones, C. A. L., Biermann, M., Evans, D. W., Eyer, L., Jansen, F., Jordi, C., Klioner, S. A., Lammers, U., Lindegren, L., Luri, X., Mignard, F., Panem, C., Pourbaix, D., ... Zwitter, T. (01 August 2018). Gaia Data Release 2. Summary of the contents and survey properties.
Astronomy and Astrophysics, 616 (A1), 1-22. doi:10.1051/0004-6361/201833051
https://hdl.handle.net/2268/228331