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Massarotti, Alessandro; et al. (janeiro de 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
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Eggleton, P. P.; Tokovinin, A. A. (setembro de 2008), «A catalogue of multiplicity among bright stellar systems», Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x
Crawford, D. L.; Barnes, J. V.; Golson, J. C. (dezembro de 1971), «Four-color, Hbeta, and UBV photometry for bright B-type stars in the northern hemisphere», Astronomical Journal, 76: 1058–1071, Bibcode:1971AJ.....76.1058C, doi:10.1086/111220
Janson, Markus; et al. (agosto de 2011), «High-contrast Imaging Search for Planets and Brown Dwarfs around the Most Massive Stars in the Solar Neighborhood», The Astrophysical Journal, 736 (2): 89, Bibcode:2011ApJ...736...89J, doi:10.1088/0004-637X/736/2/89
Lefever, K.; et al. (junho de 2010), «Spectroscopic determination of the fundamental parameters of 66 B-type stars in the field-of-view of the CoRoT satellite», Astronomy and Astrophysics, 515: A74, Bibcode:2010A&A...515A..74L, doi:10.1051/0004-6361/200911956
Massarotti, Alessandro; et al. (janeiro de 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
Richichi, A.; Percheron, I.; Khristoforova, M. (fevereiro de 2005), «CHARM2: An updated Catalog of High Angular Resolution Measurements», Astronomy and Astrophysics, 431: 773–777, Bibcode:2005A&A...431..773R, doi:10.1051/0004-6361:20042039
Krisciunas, K. (maio de 1994), «Further Photometry of alpha Ori and gamma Ori», Information Bulletin on Variable Stars, 4028: 1, Bibcode:1994IBVS.4028....1K
Eggleton, P. P.; Tokovinin, A. A. (setembro de 2008), «A catalogue of multiplicity among bright stellar systems», Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x