Tài liệu tham khảo WikiPedia: NGC_514 http://cseligman.com/text/atlas/ngc5.htm#514 http://nedwww.ipac.caltech.edu/cgi-bin/nph-objsear... http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=... http://vizier.u-strasbg.fr/viz-bin/VizieR-S?Gaia%2... //arxiv.org/abs/1302.3853 //arxiv.org/abs/1605.01765 //arxiv.org/abs/1804.09365 //arxiv.org/abs/astro-ph/0510694 //arxiv.org/abs/astro-ph/0606440 //arxiv.org/abs/astro-ph/9704107
