Gaia GraL: Gaia DR2 gravitational lens systems - I. New quadruply imaged quasar candidates around known quasars
A. Krone-Martins, L. Delchambre, O. Wertz, C. Ducourant, F. Mignard, R. Teixeira, J. Klüter, J.-F. Le Campion, L. Galluccio, J. Surdej, U. Bastian, J. Wambsganss, M. J. Graham, S. G. Djorgovski and E. Slezak
A&A, 616 (2018) L11
DOI: https://doi.org/10.1051/0004-6361/201833337