(en) Martin Gaskell, «Supermassive black holes: Together at last - Figure 1: Dual active galactic nuclei in the merging galaxy NGC 1128», Nature Physics, vol.10, , p.481–482 (DOI10.1038/nphys3015, lire en ligne)
(en) Martin Gaskell, «Supermassive black holes: Together at last - Figure 1: Dual active galactic nuclei in the merging galaxy NGC 1128», Nature Physics, vol.10, , p.481–482 (DOI10.1038/nphys3015, lire en ligne)