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D. Koçer, S. J. Adelman, H. Caliskan, A. F. Gulliver, H. Gokmen Tektunali: Elemental abundance analyses with DAO spectrograms-XXVII. The superficially normal stars θ And (A2 IV), ϵ Del (B6 III), ϵ Aqr (A1. 5 V), and ι And (B9 V). In: Astronomy and Astrophysics. 406. Jahrgang, Nr.3, August 2003, S.975–980, doi:10.1051/0004-6361:20030620, bibcode:2003A&A...406..975K.
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A. Goldin, V. V. Makarov: Unconstrained Astrometric Orbits for Hipparcos Stars with Stochastic Solutions. In: The Astrophysical Journal Supplement Series. 166. Jahrgang, Nr.1, September 2006, S.341–350, doi:10.1086/505939, arxiv:astro-ph/0606293, bibcode:2006ApJS..166..341G.