Tài liệu tham khảo WikiPedia: NGC_6910 ftp://cdsarc.u-strasbg.fr/pub/cats/J/A+A/477/165/t... ftp://cdsarc.u-strasbg.fr/pub/cats/J/A+A/558/A53/c... http://www.univie.ac.at/webda/cgi-bin/ocl_page.cgi... http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=... //arxiv.org/abs/1308.5822 //doi.org/10.1051%2F0004-6361%2F201322302 //doi.org/10.1051%2F0004-6361:20078525 //doi.org/10.1515%2Fastro-1992-0106 http://server1.wikisky.org/starview?object=NGC+691... http://www.wikisky.org/?object=NGC+6910
