Takeda, Yoichi; et al. (2018-10), “Photospheric carbon, nitrogen, and oxygen abundances of A-type main-sequence stars”, Publications of the Astronomical Society of Japan70 (5): 91, Bibcode: 2018PASJ...70...91T, doi:10.1093/pasj/psy091
Hartkopf, William I.; Mason, Brian D. (2009-09), “Speckle Interferometry at Mount Wilson Observatory: Observations Obtained in 2006-2007 and 35 New Orbits”, Astronomical Journal138 (3): 813-826, Bibcode: 2009AJ....138..813H, doi:10.1088/0004-6256/138/3/813
Takeda, Yoichi; et al. (2018-10), “Photospheric carbon, nitrogen, and oxygen abundances of A-type main-sequence stars”, Publications of the Astronomical Society of Japan70 (5): 91, Bibcode: 2018PASJ...70...91T, doi:10.1093/pasj/psy091
Hartkopf, William I.; Mason, Brian D. (2009-09), “Speckle Interferometry at Mount Wilson Observatory: Observations Obtained in 2006-2007 and 35 New Orbits”, Astronomical Journal138 (3): 813-826, Bibcode: 2009AJ....138..813H, doi:10.1088/0004-6256/138/3/813