Tài liệu tham khảo WikiPedia: 3C 401 http://ned.ipac.caltech.edu/cgi-bin/nph-objsearch?... http://resolver.scholarsportal.info/resolve/003587... //arxiv.org/abs/astro-ph/0505034 http://arxiv.org/abs/astro-ph/0505034v2 //doi.org/10.1046%2Fj.1365-8711.2000.03684.x //doi.org/10.1086%2F431236 http://www.jb.man.ac.uk/atlas/object/3C401.html https://ui.adsabs.harvard.edu/abs/2000MNRAS.317..1... https://ui.adsabs.harvard.edu/abs/2005ApJ...629..1...
