Thực đơn
NGC_4494 Tham khảoThực đơn
NGC_4494 Tham khảoLiên quan
NGC 4494 NGC 4449 NGC 4414 NGC 449 NGC 494 NGC 444Tài liệu tham khảo
WikiPedia: NGC_4494 http://ned.ipac.caltech.edu/cgi-bin/nph-objsearch?... http://ned.ipac.caltech.edu/level5/Dev2/frames.htm... http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=... //arxiv.org/abs/0908.0272 //arxiv.org/abs/1007.5200 //arxiv.org/abs/1011.6277 //arxiv.org/abs/1104.5503 //arxiv.org/abs/1204.0144 //arxiv.org/abs/astro-ph/0001140 //arxiv.org/abs/astro-ph/0412040