Anomalous behaviour of the UV–optical continuum bands in NGC 5548. - Goad, M R; Knigge, C; Korista, K T; Cackett, E; Horne, K; Starkey, D A; Peterson, B M; De Rosa, G; Kriss, G A; Edelson, R; Fausnaugh, M (Monthly Notices of the Royal Astronomical Society, 2019)