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Nancy Remage Evans, Howard E Bond, Gail H Schaefer, Brian D Mason, Evan Tingle, Margarita Karovska et Ignazio Pillitteri, « Hubble Space Telescope Snapshot Survey for Resolved Companions of Galactic Cepheids », The Astronomical Journal, vol. 151, no 5, , p. 129 (DOI10.3847/0004-6256/151/5/129, Bibcode2016AJ....151..129E, arXiv1603.02224)
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M. Ammler-von Eiff et A. Reiners, « New measurements of rotation and differential rotation in A-F stars: are there two populations of differentially rotating stars? », Astronomy & Astrophysics, vol. 542, , A116 (DOI10.1051/0004-6361/201118724, Bibcode2012A&A...542A.116A, arXiv1204.2459)
Nancy Remage Evans, Howard E Bond, Gail H Schaefer, Brian D Mason, Evan Tingle, Margarita Karovska et Ignazio Pillitteri, « Hubble Space Telescope Snapshot Survey for Resolved Companions of Galactic Cepheids », The Astronomical Journal, vol. 151, no 5, , p. 129 (DOI10.3847/0004-6256/151/5/129, Bibcode2016AJ....151..129E, arXiv1603.02224)
N. N Samus', E. V Kazarovets, O. V Durlevich, N. N Kireeva et E. N Pastukhova, « General catalogue of variable stars: Version GCVS 5.1 », Astronomy Reports, vol. 61, no 1, , p. 80–88 (DOI10.1134/S1063772917010085, Bibcode2017ARep...61...80S)
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M. Ammler-von Eiff et A. Reiners, « New measurements of rotation and differential rotation in A-F stars: are there two populations of differentially rotating stars? », Astronomy & Astrophysics, vol. 542, , A116 (DOI10.1051/0004-6361/201118724, Bibcode2012A&A...542A.116A, arXiv1204.2459)