Tài liệu tham khảo WikiPedia: NGC_5490 http://www.astrosurf.com/agerard/observ_imp/bootes... http://aladin.u-strasbg.fr/AladinPreview?-c=14+09+... http://simbad.u-strasbg.fr/simbad/sim-id?Ident=NGC... //arxiv.org/abs/1307.7213 //arxiv.org/abs/astro-ph/0011456 //doi.org/10.1086%2F322488 //doi.org/10.1086%2F498708 //doi.org/10.1088%2F0004-6256%2F146%2F4%2F86 https://ned.ipac.caltech.edu/cgi-bin/objsearch?obj... https://ui.adsabs.harvard.edu/abs/2001ApJ...560..5...
