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Lindegren, L, Hernandez, J, Bombrun, A, Klioner, S, Bastian, U, Ramos-Lerate, M, de Torres, A, Steidelmueller, H, Stephenson, C, Hobbs, D, Lammers, U, Biermann, M, Geyer, R, Hilger, T, Michalik, D, Stampa, U, McMillan, PJ, Castaneda, J, Clotet, M, Comoretto, G et al, Davidson, M, Fabricius, C, Gracia, G, Hambly, NC, Hutton, A, Mora, A, Portell, J, van Leeuwen, F, Abbas, U, Abreu, A, Altmann, M, Andrei, A, Anglada, E, Balaguer-Nunez, L, Barache, C, Becciani, U, Bertone, S, Bianchi, L, Bouquillon, S, Bourda, G, Brusemeister, T, Bucciarelli, B, Busonero, D, Buzzi, R, Cancelliere, R, Carlucci, T, Charlot, P, Cheek, N, Crosta, M, Crowley, C, de Bruijne, J, de Felice, F, Drimmel, R, Esquej, P, Fienga, A, Fraile, E, Gai, M, Garralda, N, Gonzalez-Vidal, JJ, Guerra, R, Hauser, M, Hofmann, W, Holl, B, Jordan, S, Lattanzi, MG, Lenhardt, H, Liao, S, Licata, E, Lister, T, Loeffler, W, Marchant, JM, Martin-Fleitas, J-M, Messineo, R, Mignard, F, Morbidelli, R, Poggio, E, Riva, A, Rowell, N, Salguero, E, Sarasso, M, Sciacca, E, Siddiqui, H, Smart, RL, Spagna, A, Steele, IA, Taris, F, Torra, J, van Elteren, A, van Reeven, W and Vecchiato, A (2018) Gaia Release Data 2 The astrometric solution. Astronomy & Astrophysics, 616. ISSN 1432-0746