Optically variable AGN in the three-year VST survey of the COSMOS field D. De Cicco, M. Paolillo, S. Falocco, M. Poulain, W. N. Brandt, F. E. Bauer, F. Vagnetti, G. Longo, A. Grado, F. Ragosta et al. (9 more) A&A, 627 (2019) A33 Published online: 27 June 2019 DOI: 10.1051/0004-6361/201935659