Vázquez, Ruben A.; May, Jorge; Carraro, Giovanni; Bronfman, Leonardo; Moitinho, André; Baume, Gustavo (). „Spiral Structure in the Outer Galactic Disk. I. The Third Galactic Quadrant”. The Astrophysical Journal. 672 (2): 930–939. Bibcode:2008ApJ...672..930V. doi:10.1086/524003.Mentenanță CS1: Nume multiple: lista autorilor (link)
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Vázquez, Ruben A.; May, Jorge; Carraro, Giovanni; Bronfman, Leonardo; Moitinho, André; Baume, Gustavo (). „Spiral Structure in the Outer Galactic Disk. I. The Third Galactic Quadrant”. The Astrophysical Journal. 672 (2): 930–939. Bibcode:2008ApJ...672..930V. doi:10.1086/524003.Mentenanță CS1: Nume multiple: lista autorilor (link)