Liên quan Sigma Sigmar Gabriel Sigma Octantis Sigma Sagittarii Sigma Leonis Sigma Pegasi Sigmaringen Sigma Aquilae Sigma-Aldrich Sigma (lớp tàu corvette/khinh hạm)
Tài liệu tham khảo WikiPedia: Sigma Pegasi http://adsabs.harvard.edu/abs/1978A&AS...34....1N http://adsabs.harvard.edu/abs/2005AJ....129.1483L http://adsabs.harvard.edu/abs/2005PASJ...57...13T http://adsabs.harvard.edu/abs/2006AJ....132..161G http://adsabs.harvard.edu/abs/2006MNRAS.371.1793K http://adsabs.harvard.edu/abs/2007A&A...474..653V http://adsabs.harvard.edu/abs/2007AJ....133..889L http://adsabs.harvard.edu/abs/2008MNRAS.389..869E http://adsabs.harvard.edu/abs/2009A&A...508.1313F http://adsabs.harvard.edu/abs/2013A&A...551L...8P
