Tài liệu tham khảo WikiPedia: 61_Virginis http://www.solstation.com/stars/61virgin.htm http://www.ari.uni-heidelberg.de/datenbanken/aricn... http://exoplanet.eu/star.php?st=61+Vir http://aladin.u-strasbg.fr/alapre.pl?-c=13+18+24.3... http://simbad.u-strasbg.fr/simbad/sim-id?Ident=61+... //pubmed.ncbi.nlm.nih.gov/16689649 //arxiv.org/abs/0708.1752 //arxiv.org/abs/0807.1686 //arxiv.org/abs/0811.3982 //arxiv.org/abs/0912.2599
