Catalog of quasars from the Kilo-Degree Survey Data Release 3S. Nakoneczny, M. Bilicki, A. Solarz, A. Pollo, N. Maddox, C. Spiniello, M. Brescia and N. R. NapolitanoA&A, 624 (2019) A13DOI: https://doi.org/10.1051/0004-6361/201834794