Massarotti, Alessandro; 외. (January 2008), “Rotational and radial velocities for a sample of 761 HIPPARCOS giants and the role of binarity”, 《The Astronomical Journal》 135 (1): 209–231, Bibcode:2008AJ....135..209M, doi:10.1088/0004-6256/135/1/209.
Abt, Helmut A. (2008). “Visual Multiples. IX. MK Spectral Types”. 《The Astrophysical Journal Supplement Series》 176 (1): 216–217. Bibcode:2008ApJS..176..216A. doi:10.1086/525529.
Massarotti, Alessandro; 외. (January 2008), “Rotational and radial velocities for a sample of 761 HIPPARCOS giants and the role of binarity”, 《The Astronomical Journal》 135 (1): 209–231, Bibcode:2008AJ....135..209M, doi:10.1088/0004-6256/135/1/209.
Abt, Helmut A. (2008). “Visual Multiples. IX. MK Spectral Types”. 《The Astrophysical Journal Supplement Series》 176 (1): 216–217. Bibcode:2008ApJS..176..216A. doi:10.1086/525529.