A redshifted excess in the broad emission lines after the flare of the γ-ray narrow-line Seyfert 1 PKS 2004−447W. Hon, M. Berton, E. Sani, R. Webster, C. Wolf, A. F. Rojas, P. Marziani, J. Kotilainen and E. CongiuA&A, 672 (2023) L14DOI: https://doi.org/10.1051/0004-6361/202245184
