Harrison, C. et al. Agn outflows and feedback twenty years on. Nat. Astron. Ser. 2, 198 (2018).
Ulrich, M.-H., Maraschi, L. & Urry, C. M. Variability of active galactic nuclei. Annu. Rev….
Harrison, C. et al. Agn outflows and feedback twenty years on. Nat. Astron. Ser. 2, 198 (2018).
Ulrich, M.-H., Maraschi, L. & Urry, C. M. Variability of active galactic nuclei. Annu. Rev….