G.G.MeylanG.G. i inni, Mayall II = G1 in M31: Giant Globular Cluster or Core of a Dwarf Elliptical Galaxy?, „The Astronomical Journal”, 2, 122, s. 830-841, DOI: 10.1086/321166, Bibcode: 2001AJ....122..830M(ang.).
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G.G.MeylanG.G. i inni, Mayall II = G1 in M31: Giant Globular Cluster or Core of a Dwarf Elliptical Galaxy?, „The Astronomical Journal”, 2, 122, s. 830-841, DOI: 10.1086/321166, Bibcode: 2001AJ....122..830M(ang.).