Unidentified quasars among stationary objects from Gaia DR2 K. E. Heintz, J. P. U. Fynbo, E. Høg, P. Møller, J.-K. Krogager, S. Geier, P. Jakobsson and L. Christensen A&A, 615 (2018) L8 Published online: 19 July 2018 DOI: 10.1051/0004-6361/201833396